Labels: australia, beatles, cbc, environment, evolution, holiday, lipglossandlaptops, microsoft, photography, podcast, sex, vancouver, video
Next month, it will be exactly 150 years since Charles Darwin published On the Origin of Species in 1859. This year also marked what would have been his 200th birthday. Unsurprisingly, there are a lot of new books and movies and TV shows and websites about Darwin and his most important book this year.
Of the books, I've bought and read the three of the highest-profile ones: Neil Shubin's Your Inner Fish (actually published in 2008), Jerry Coyne's Why Evolution is True, and Richard Dawkins's The Greatest Show on Earth: The Evidence for Evolution. They're all written by working (or, in Dawkins's case, officially retired) evolutionary biologists, but are aimed at a general audience, and tell compelling stories of what we know about the history of life on Earth and our part in it. I also re-read my copy of the first edition of the Origin itself, as well as legendary biologist Ernst Mayr's 2002 What Evolution Is, a few months ago.
Aside from the Darwin anniversaries, I wanted to read the three new books because a lot has changed in the study of evolution since I finished my own biology degree in 1990. Or, I should say, not much has changed, but we sure know a lot more than we did even 20 years ago. As with any strong scientific idea, evidence continues accumulating to reinforce and refine it. When I graduated, for instance:
...and so on. Perhaps most shocking in hindsight, back in 1990 religious fundamentalism of all stripes seemed to be on the wane in many places around the world. By association, creationism and similar world views that ignore or deny that biological evolution even happens seemed less and less important.
Or maybe it just looked that way to me as I stepped out of the halls of UBC's biology buildings. After all, whether studying behavioural ecology, human medicine, cell physiology, or agriculture, no one there could get anything substantial done without knowledge of evolution and natural selection as the foundations of everything else.
The books by Shubin, Coyne, and Dawkins are not only welcome and useful in 2009, they are necessary. Because unlike in other scientific fields—where even people who don't really understand the nature of electrons or fluid dynamics or organic chemistry still accept that electrical appliances work when you turn them on, still fly in planes and ride ferryboats, and still take synthesized medicines to treat diseases or relieve pain—there are many, many people who don't think evolution is true.
No physicians must write books reiterating that, yes, bacteria and viruses are what spread infectious diseases. No physicists have to re-establish to the public that, honestly, electromagnetism is real. No psychiatrists are compelled to prove that, indeed, chemicals interacting with our brain tissues can alter our senses and emotions. No meteorologists need argue that, really, weather patterns are driven by energy from the Sun. Those things seem obvious and established now. We can move on.
But biologists continue to encounter resistance to the idea that differences in how living organisms survive and reproduce are enough to build all of life's complexity—over hundreds of millions of years, without any pre-existing plan or coordinating intelligence. But that's what happened, and we know it as well as we know anything.
If the Bible or the Qu'ran is your only book, I doubt much will change your mind on that. But many of the rest of those who don't accept evolution by natural selection, or who are simply unsure of it, may have been taught poorly about it back in school—or if not, they might have forgotten the elegant simplicity of the concept. Not to mention the huge truckloads of evidence to support evolutionary theory, which is as overwhelming (if not more so) and more immediate than the also-substantial evidence for our theories about gravity, weather forecasting, germs and disease, quantum mechanics, cognitive psychology, or macroeconomics.
So, if these three biologists have taken on the task of explaining why we know evolution happened, and why natural selection is the best mechanism to explain it, how well do they do the job? Very well, but also differently. The titles tell you.
Shubin's Your Inner Fish is the shortest, the most personal, and the most fun. Dawkins's The Greatest Show on Earth is, well, the showiest, the biggest, and the most wide-ranging. And Coyne's Why Evolution is True is the most straightforward and cohesive argument for evolutionary biology as a whole—if you're going to read just one, it's your best choice.
However, of the three, I think I enjoyed Your Inner Fish the most. Author Neil Shubin was one of the lead researchers in the discovery and analysis of Tiktaalik, a fossil "fishapod" found on Ellesmere Island here in Canada in 2004. It is yet another demonstration of the predictive power of evolutionary theory: knowing that there were lobe-finned fossil fish about 380 million years ago, and obviously four-legged land dwelling amphibian-like vertebrates 15 million years later, Shubin and his colleagues proposed that an intermediate form or forms might exist in rocks of intermediate age.
Ellesmere Island is a long way from most places, but it has surface rocks about 375 million years old, so Shubin and his crew spent a bunch of money to travel there. And sure enough, there they found the fossil of Tiktaalik, with its wrists, neck, and lungs like a land animal, and gills and scales like a fish. (Yes, it had both lungs and gills.) Shubin uses that discovery to take a voyage through the history of vertebrate anatomy, showing how gill slits from fish evolved over tens of millions of years into the tiny bones in our inner ear that let us hear and keep us balanced.
Since we're interested in ourselves, he maintains a focus on how our bodies relate to those of our ancestors, including tracing the evolution of our teeth and sense of smell, even the whole plan of our bodies. He discusses why the way sharks were built hundreds of millions of years ago led to human males getting certain types of hernias today. And he explains why, as a fish paleontologist, he was surprisingly qualified to teach an introductory human anatomy dissection course to a bunch of medical students—because knowing about our "inner fish" tells us a lot about why our bodies are this way.
Richard Dawkins and Jerry Coyne tell much bigger stories. Where Shubin's book is about how we people are related to other creatures past and present, the other two seek to explain how all living things on Earth relate to each other, to describe the mechanism of how they came to the relationships they have now, and, more pointedly, to refute the claims of people who don't think those first two points are true.
Dawkins best expresses the frustration of scientists with evolution-deniers and their inevitable religious motivations, as you would expect from the world's foremost atheist. He begins The Greatest Show on Earth with a comparison. Imagine, he writes, you were a professor of history specializing in the Roman Empire, but you had to spend a good chunk of your time battling the claims of people who said ancient Rome and the Romans didn't even exist. This despite those pesky giant ruins modern Romans have had to build their roads around, and languages such as Italian, Spanish, Portuguese, French, German, and English that are obviously derived from Latin, not to mention the libraries and museums and countrysides full of further evidence.
He also explains, better than anyone I've ever read, why various ways of determining the ages of very old things work. If you've ever wondered how we know when a fossil is 65 million years old, or 500 million years old, or how carbon dating works, or how amazingly well different dating methods (tree ring information, radioactive decay products, sedimentary rock layers) agree with one another, read his chapter 4 and you'll get it.
Alas, while there's a lot of wonderful information in The Greatest Show on Earth, and many fascinating photos and diagrams, Dawkins could have used some stronger editing. The overall volume comes across as scattershot, assembled more like a good essay collection than a well-planned argument. Dawkins often takes needlessly long asides into interesting but peripheral topics, and his tone wanders.
Sometimes his writing cuts precisely, like a scalpel; other times, his breezy footnotes suggest a doddering old Oxford prof (well, that is where he's been teaching for decades!) telling tales of the old days in black school robes. I often found myself thinking, Okay, okay, now let's get on with it.
On the other hand, Jerry Coyne strikes the right balance and uses the right structure. On his blog and in public appearances, Coyne is (like Dawkins) a staunch opponent of religion's influence on public policy and education, and of those who treat religion as immune to strong criticism. But that position hardly appears in Why Evolution is True at all, because Coyne wisely thinks it has no reason to. The evidence for evolution by natural selection stands on its own.
I wish Dawkins had done what Coyne does—noting what the six basic claims of current evolutionary theory are, and describing why real-world evidence overwhelmingly shows them all to be true. Here they are:
The rest of Coyne's book, in essence, fleshes those claims and the evidence out. That's almost it, and that's all it needs to be. He recounts too why, while Charles Darwin got all six of them essentially right back in 1859, only the first three or four were generally accepted (even by scientists) right away. It took the better part of a century for it to be obvious that he was correct about natural selection too, and even more time to establish our shared common ancestry with all plants, animals, and microorganisms.
Better than other books about evolution I've read, Why Evolution is True reveals the relentless series of tests that Darwinism has been subjected to, and survived, as new discoveries were made in astronomy, geology, physics, physiology, chemistry, and other fields of science. Coyne keeps pointing out that it didn't have to be that way. Darwin was wrong about quite a few things, but he could have been wrong about many more, and many more important ones.
If inheritance didn't turn out to be genetic, or further fossil finds showed an uncoordinated mix of forms over time (modern mammals and trilobites together, for instance), or no mechanism like plate tectonics explained fossil distributions, or various methods of dating disagreed profoundly, or there were no imperfections in organisms to betray their history—well, evolutionary biology could have hit any number of crisis points. But it didn't.
Darwin knew nothing about some of these lines of evidence, but they support his ideas anyway. We have many more new questions now too, but they rest on the fact of evolution, largely the way Darwin figured out that it works.
Facts, like life, survive the onslaughts of time. Opponents of evolution by natural selection have always pointed to gaps in our understanding, to the new questions that keep arising, as "flaws." But they are no such thing: gaps in our knowledge tell us where to look next. Conversely, saying that a god or gods, some supernatural agent, must have made life—because we don't yet know exactly how it happened naturally in every detail—is a way of giving up. It says not only that there are things we don't know, but things we can never learn.
Some of us who see the facts of evolution and natural selection, much the way Darwin first described them, prefer not to believe things, but instead to accept them because of supporting scientific evidence. But I do believe something: that the universe is coherent and comprehensible, and that trying to learn more about it is worth doing for its own sake.
In the 150 years since the Origin, people who believed that—who did not want to give up—have been the ones who helped us learn who we, and the other organisms who share our planet, really are. Thousands of researchers across the globe help us learn that, including Dawkins exploring how genes, and ideas, propagate themselves; Coyne peering at Hawaiian fruit flies through microscopes to see how they differ over generations; and Shubin trekking to the Canadian Arctic on the educated guess that a fishapod fossil might lie there.
The writing of all three authors pulses with that kind of enthusiasm—the urge to learn the truth about life on Earth, over more than 3 billion years of its history. We can admit that we will always be somewhat ignorant, and will probably never know everything. Yet we can delight in knowing there will always be more to learn. Such delight, and the fruits of the search so far, are what make these books all good to read during this important anniversary year.
Labels: anniversary, books, controversy, evolution, religion, review, science
When I learned to play rock music back in the '80s, Vancouver's Odds (and their cover-band alter-ago The Dawn Patrol) were among my key inspirations. I got to know some of the guys in the band too. In the last five or six years, Odds bassist Doug Elliott has also become a good friend, as well as playing bass sometimes in my band.
After a hiatus of close to a decade, the Odds returned with a tweaked lineup of musicians and a new album, Cheerleader, last year, and now they've posted all their music videos dating back to 1991 on YouTube. They're worth a look and a listen. I think "Someone Who's Cool" is still my favourite:
Although the big suit shoulders and done-to-the-neck dress shirts of the early-'90s ones have a certain retro appeal too. Make sure you read the little descriptions by the band.
Some of the best Odds songs combine the intelligence of Elvis Costello with the booty-shaking overdriven guitar boogie of AC/DC, and that's a hard balance to accomplish.
Labels: band, friends, music, odds, video, youtube
A couple of weeks ago, my wife Air pointed out to me that the sidewalks in front of convenience stores throughout Greater Vancouver have recently sprouted large, inflatable polar bears promoting Klondike ice cream bars:
The Klondike promotions rep was obviously very busy around Vancouver in October. Both Air and I like the inflatable bears—they're cute, and large, and strange. Most effectively, they point out how many independent mom-and-pop style corner stores there still are in this city. I'm often tempted to assume that most have been put out of business by 7-Eleven and gas station shops, but that appears not to be the case.
My set of nine photos above resulted from my simply keeping an eye out for the bears during a couple of car trips on a single day this past week. Most of the pictures are from just one street, the main inter-city artery Kingsway. There must be dozens or hundreds of the beasts throughout the region.
One I didn't manage to snap is probably breaking the rules. On Canada Way, there's an independent Buffalo gas station that has covered the Klondike logo with a sign reading "HAND CAR WASH." That promo rep might be angry if he or she spots it.
Labels: animals, food, humour, shopping, signs, vancouver
Derived from the same CT scan of my body taken a few weeks ago is this 3D movie, also made with the open-source OsiriX software:
You can clearly see my portacath, which showed up just as well as my ribs. Freaky.
Labels: cancer, chemotherapy, ctscan, geekery, photography, science, software, videogames
John Gruber points to this article about PC upgrades by Marco Arment:
The upgrade market for average PC owners is dead. We killed it. [...]
In 1998, when everyone was happily using long filenames and browsing the internet and playing their first MP3s and editing their first scanned photos to email to their relatives, a five-year-old computer couldn't easily do any of these things.
But what common tasks in 2009 can't be accomplished by a 2.8 GHz Pentium 4 PC with Windows XP SP2 and a cable internet connection—the average technology of 2004? Not much that regular people actually do.
That reminded me of something Geoff Duncan wrote at least five years ago, which I can no longer find anywhere online:
Your average PC user doesn't update anything. They just throw the computer away when it stops working and buy a new one, then don't change the software on it either for fear of breaking something.
Things haven't changed much, but we'll see if enough people need new computers in the next little while to give Windows 7 a boost. Microsoft's new operating system comes out this week.
Labels: geekery, microsoft, windows, windows7
Here, take a look at this extremely cool and scientifically amazing picture:
That's me, via a few slices from my latest CT scan, taken at the end of September 2009. I opened the files provided to me by the B.C. Cancer Agency's Diagnostic Imaging department using the open-source program OsiriX, giving me my first chance to take a first-hand look at my cancer in almost a year. Before that, the I'd only seen my original colon tumour on the flexible sigmoidoscopy camera almost three years ago.
I've circled the biggest lung tumours metastasized from my original colon cancer (which was removed by surgery in mid-2007). You can see the one in my upper left lung and two (one right behind the other) in my lower left lung. There are six more tumours, all smaller, not easily visible in this view. I'm not a radiologist, so I couldn't readily distinguish the smallest ones from regular lung matter and other tissue. Nevertheless, now we can all see what I'm dealing with.
These blobs of cancer have all grown slightly since I started treatment with cediranib in November 2008. To my untrained eye, the view doesn't look that different from the last time I saw my scan in December of that year, which is fairly good as far as I'm concerned. Not as good as if they'd stabilized or shrunk, but better than many other possibilities.
Labels: cancer, chemotherapy, ctscan, geekery, photography, science, software, video
From my Twitter stream:
Labels: animals, apple, biology, cartoon, geekery, humour, insidehomerecording, iphone, ipod, itunes, linksofinterest, nikon, photography, politics, science, surgery, television, video, web
It's Sunday night and I'm not sleepy. Well, I am, but I can't sleep, don't really want to yet. Everyone else in the house is down for the count until morning. I've always enjoyed this time, taking me back to being an only child alone with my thoughts—except my wonderful wife is breathing beside me in bed, which is much better, and endlessly comforting.
But tonight's not happy, or sad. It just is. Every day is a fight. Every. Fucking. Day. And every night too. Not a fight with a person, but with my own cells, useless greasy tissues that don't belong where they're growing in my lungs. I never know how much of my pain and fatigue is from them, and how much from the punishing medicine that slows the rate of cancer cell division inside me.
I spent a lot of this weekend in the bathroom. I don't know if that's a pattern yet, or just a rough few days of side effects. (But not as rough as some have been.) I cooked a pretty nice tikka masala dish tonight, and my wife brought home a lemon meringue pie for dessert. Our dinner with the kids at the kitchen table was my best part of Sunday.
Sometimes, like now, I don't want to sleep because I don't know what I'll be like when I wake up. Will I feel better, worse, the same? I can't predict, but at least I'm confident I will wake up. Will I sleep well, and rise rested, or toss and turn? Or will I be in the bathroom again, perhaps for hours? I don't really know.
I try to live day by day, but you have to plan something, even if your plans fall through. I have a few plans for tomorrow, and maybe I'll get to some of them. Or at least one. Or, just maybe if tonight goes poorly, none. These are my days and nights, more than three years after I developed cancer, and almost three years after I found out about the first (but not the worst) of it.
A fight. Every. Fucking. Day. And night. And more tomorrow. Time to sleep now, I think. To be ready.
Labels: cancer, chemotherapy, family, fatigue, pain
Today, as part of Blog Action Day, I've agreed to write about the environment and climate change. I've done that here many times before, generally in a positive way, or at least a frustrated one. But not today.
Maybe I'm just in a pessimistic mood, but honestly, I'm starting to think we're screwed. There are honest moves afoot, especially in Europe, to change patterns of human energy consumption and reduce carbon emissions. But here in North America, where we use more energy per person than all but a few very small countries, we're doing essentially nothing.
I first became aware of increasing human effects on the Earth's climate around Earth Day in 1990, almost 20 years ago, which was a pretty high-profile event. For awhile after that, there were lots of recycled products in the grocery stores, and talk of converting away from oil, gas, and coal to heat our houses, generate our electricity, and power our vehicles.
And then things slid back roughly to where they were before. Paper towels and toilet paper went from recycled brown to bleached white again. As the economy boomed, people who never went off-road or hauled lumber bought huge Hummers and pickup trucks. Politicians, businesspeople, activists, and others expended a lot of words about the problem of climate change. Yet here in Canada, while we've improved the efficiency of what we do, our overall emissions keep going up, despite our promises.
In the United States and Canada, we're distracted by economic crises and healthcare reform and celebrity scandals and cable reality shows. The developing world is growing too fast not to increase their own emissions. Europe and other countries making efforts aren't enough. By the time sea levels start rising in earnest and the social and political disruptions start, we probably won't be able to keep climates from changing all around the world.
So in all likelihood, we'll wait too long, and we'll have to adapt as our environment alters wildly around us. That will be expensive, disruptive, and probably bloody in all sorts of ways.
I'm not saying we should give up and do nothing, but right now it seems that, collectively, we (and I'm fully including myself here) are very nearly doing nothing by default. Since I have cancer, I don't know if I'll be around to see what happens in a few decades. But my kids will. They will most probably, as the curse goes, live in interesting times.
Labels: americas, blog, canada, environment, linkbait, news, politics
When we sold our old laptop recently, we used the money to buy a couple of iPod touches for our kids. I know, we spoil them terribly and all that. Ours is a geek house. Get used to it. (And if you're interested in their old iPod nanos, those are for sale too—let me know.)
Ordering online, I presumed (naively) that while the iPods are of course made in China, there would probably be a North American distribution centre where they are individually laser engraved and then shipped to customers here. But Apple and UPS let you track your order. Ours shipped directly out of China, and the results are a bit depressing.
There's been a lot of hoopla about Apple pulling out of the U.S. Chamber of Commerce over the Chamber's poor climate-change policies, Apple's greener laptops made with more recyclable materials, and so on, but I have to wonder whether many of those efforts are being negated by the insanely inefficient transport routes taken by items shipped from the online Apple Store.
Although I ordered two identical devices (with separate custom engraving on the back of each) at the same time, as part of the same order, here's how the two iPods are getting to our house:
Same order, same type of device, same factory. But apparently, the most cost-effective way to get them to me was to send them together from Shanghai to Anchorage to Louisville, then to separate them, sending one via New York, Ontario, Manitoba, and Alberta, and the other via Québec, Ontario, and Alberta. Both passed through Mount Hope and Calgary, but at different times. They're both now in Richmond on the way here to Burnaby, hopefully on the same truck (but I'm not sure of that—see below for an unimpressive update).
It's about 9,000 km direct from Shanghai to Vancouver by plane, but on these routes each iPod has traveled almost twice that far (around 17,000 km) by plane and truck, with takeoffs, landings, and transfers. I know the packages are small, but the price of shipping that way can't possibly be taking into account the relative energetic and environmental costs of the two routes.
Never mind that, by essentially excluding environmental effects, it's less expensive to manufacture the iPods an ocean away to start with. How do these transactions add up, when you multiply them by the millions?
If we're interested in ameliorating climate change, I think that we'll have to address the mismatch between the monetary efficiency and energetic inefficiency of these haphazard transportation methods. But that will likely mean that our gadgets will get more expensive in the short term, in order to make our lives more tolerable in the long term. I have a feeling that, with our generally shortsighted human thinking, we might not be willing to accept that.
And that's a bit of a bummer.
UPDATE 11:30 a.m.: There's something amusing about the situation now. Both iPods arrived at Vancouver International Airport in Richmond before sunrise this morning, after making their way halfway around the world, rapid-fire, in five days. But they've now, apparently, been sitting at YVR, about 12 km away from my house, for three and a half hours without being loaded on a truck, because of "adverse weather conditions." What are those conditions? It's raining a bit. In Vancouver, in the autumn.
FURTHER UPDATE 2:00 p.m.: Delivery. Of one of the iPods. They were both at the airport, both supposedly delayed by weather (though it's sunny now), and one got put on a truck and arrived at the house a few minutes ago. The other one, presumably, is coming on another truck. Point reinforced. Next time I'll buy retail, where I can at least assume that two of the same product from the same batch came to the store in the same vehicle.
FINAL UPDATE 5:00 p.m.: The delay of the second shipment at YVR is a mystery even to the friendly UPS phone rep. It will be delivered tomorrow, taking longer to travel the 12 km from the airport to my house than it did to traverse the 3500 km from Ontario to the West Coast yesterday.
Labels: apple, china, environment, ipod, transportation, vancouver
Dave Winer has posted a bunch of photos from his parents, reaching back more than 50 years. A picture of Vancouver's Coal Harbour from his family trip here in the '60s is fascinating, because here's a similar view today.
Things have changed a little. If you open the two images in separate windows or browser tabs and look carefully, you might be able to spot a couple of the same buildings.
Labels: davewiner, history, photography, vancouver
Vancouver historian Chuck Davis has been writing a series of posts for re:place magazine about the city, summarizing a single year of the city's history each time. The series is called "A Year in Five Minutes," though I think you'd have to read pretty fast to get through each entry in that little time.
He's just reached 1938 and 1939, the years my mother (here in Vancouver) and father (in Berlin) were born, respectively. You can visit the Year in Five Minutes category regularly, or subscribe to the RSS feed for those stories. I'm finding them an enjoyable read. Fellow Vancouverites, former residents, or other B.C. history buffs might too.
Labels: blog, history, vancouver, web
This week I walked around our neighbourhood a bit and took some photos of signs. I'm not much of a typeface nerd, but I did notice something.
Some years ago, when I designed the first version of penmachine.com, I created the logo header using the font Myriad, which I've liked for a long time:
Various weights and styles of Myriad have become my go-to Penmachine fonts, for the cover of my 2005 album, as titles for videos, and so on. When I picked Myriad, I didn't find it too common. But over the past two or three years, it's started showing up more often elsewhere. Here were a couple of examples from my walk:
Myriad is versatile and friendly, so I'm not surprised that I'm seeing it more. Of course, there are also lots of... uh... less elegant choices out there:
If you ever wonder what a particular font is, WhatTheFont.com lets you point to or upload a picture and will try to figure it out automatically for you. It doesn't always work, but especially if you have a clean image, it often does a good job.
Labels: font, geekery, vancouver
Things have been all a-twitter about Canadian mobile carriers Bell and Telus (my cell phone provider) starting to sell Apple's iPhone, supposedly next month. My wife Air told me the scoop yesterday, and I was surprised, and skeptical.
But it sounds like it's really happening. This is a bigger deal than it seems if you don't follow the mobile phone industry, for two reasons:
In North America, many mobile phones (such as BlackBerry devices) come in both CDMA and GSM versions for different carriers, but the iPhone has been GSM-only since its introduction in 2007. It turns out that Bell and Telus have been installing some GSM technology on their cellular towers for at least a year, and planning to have it ready for many customers in 2010.
But now it looks like they'll be early, and the iPhone may be their first big rollout of 3G (third-generation) GSM wireless. And although it will be awhile, my old CDMA phone is likely on the way to becoming obsolete. Qualcomm, which owns the CDMA patents and licenses them to carriers and device makers, had better be looking for some new way to make money.
Labels: apple, canada, geekery, iphone, telecommunications, telus
I'm the co-host of Inside Home Recording and engineer for Lip Gloss and Laptops, my wife's podcast. We're trying the usual social-media methods of garnering nominations for the annual Podcast Awards, which have been running for a few years now and are organized by Todd Cochrane of Geek News Central.
If you'd like to help out, here's what I'd ask you to do by the deadline of October 18, 2009:
Remember, the deadline is October 18. I'll let you know when the actual voting begins after that, especially if either of our podcasts get in. And of course, please subscribe to the shows if you don't already!
Labels: insidehomerecording, linkbait, lipglossandlaptops, podcast
First, let's get something out of the way: the term missing link has long been useless, especially in human palaeontology. That's reinforced by this week's publication of a special issue of the journal Science, focusing on the 4.4-million-year-old skeleton of Ardipithecus ramidus, nicknamed "Ardi."
Chimpanzees are the closest living relative to human beings in the world, but our common ancestor lived a long time ago—at least 6 million years, likely more. When Charles Darwin proposed, some 150 years ago, that the fossil links between humans and chimps were likely to be found in Africa, he was right, but at the time those links really were missing.
It took a few decades until the first Homo erectus fossils were found in Asia. Since then, palaeontologists have found many different skeletons and skeletal parts of Homo, Paranthropus, and Australopithecus, with the oldest, as predicted, all in Africa. We've been filling in our side of the chimp-human family tree for over a century. (The chimpanzee lineage has been more difficult, probably because their ancestors' forest habitats are less prone to preserving fossils—and we're less prone to paying as much attention to it too.)
So it's been a long time since the links were missing, and the term missing link is now more misleading than helpful. Like "Ida," the 47-million-year-old primate revealed with too much hype earlier this year, "Ardi" is no missing link, but she is another fascinating fossil showing interesting things about our ancestry. Most notably, she walked upright as we do, but had a much smaller brain, more like other apes—as well as feet that remained better for climbing trees than ours.
None of that should be shocking. We shouldn't expect any common ancestor of chimps and humans to be more like either one of us, since both lineages have kept evolving these past 6 million years. Ardi isn't a common ancestor—she's more closely related to humans than to chimps, and accordingly shows more human characteristics (or, perhaps better, we show characteristics more like hers), like bipedal walking and flexible wrists. That's extremely cool.
Also interestingly, "Ardi" is not new. It's taken researchers more than 15 years to analyze her, and similar fossils found nearby in Ethiopa's Afar desert. Simply teasing the extremely fragile, powdery fossil materials out of the soil without destroying them took years. Science can sometimes be a painstaking process, not for those who lack patience.
Labels: africa, controversy, evolution, history, science