evolution
grrlscientist | February 4, 2009tags: David Attenborough, nature, evolution, environment, streaming video
British broadcaster Sir David Attenborough presents his views on Charles Darwin, natural selection, and how the Bible has put the natural world in peril in an exclusive interview for Nature Video [4:27]
pharyngula | February 4, 2009My teaching schedule this semester is a major time-suck; I'm teaching genetics and all of its associated labs (you really don't want to know how much prep time goes into setting up fly labs), I'm doing some major revision of the content this year, and I've got this asymmetric schedule that packs everything into the first half of each week. So I simply have to protest when those evil (Stein was right!) scientists announce a major discovery on a Tuesday, which just happens to be the very worst day of the week for me. They've gone and found another important whale transitional fossil, Maiacetus…
jwhitfield | February 4, 2009When the Origin was published, the idea that species were not fixed entities had been in the air for some time, thanks to Lamarck, Robert Chambers, anonymous author of the best-selling Vestiges of the Natural History of Creation, and Darwin's own grandfather, Erasmus.
But unlike those men, Darwin put all the different pieces together into a coherent whole. How was that? Chapter 11 of the Origin, 'Geographical distribution', gives some hints.
First there's the nurture. In the age of long-haul flights and wildlife documentaries, it's easy to forget how difficult it was to see different…
clock | February 3, 2009When I was a little kid, almost nothing was known about evolution of whales. They were huge, they were marine and they were mammals, but their evolutionary ancestry was open to speculation. Some (like Darwin himself) hypothesized that the terrestrial ancestor of whales looked like a bear. Others favored the idea of a hippo-like or even a pig-like ancestor.
Over the decades, two things happened. First, the revolution in molecular biology and computing power allowed scientists to compare many genes of many mammals and thus infer genealogical relationships between whales and other groups of…
gregladen | February 3, 2009An article released moments ago in PLoS ONE, by Gingerich et al., describes one of the more interesting fossil discoveries ever.
To cut right to the conclusion: We now have reason to believe that the proto-whale Maiacetus inuus, a true transitional form, gave birth on land, not in the water.
Artist's conception of male Maiacetus inuus with opaque skeleton overlay. Credit: John Klausmeyer and Bonnie Miljour, University of Michigan Museums of Natural History
Maiacetus inuus is a newly described member of a larger group of proto-cetids (proto-whales) that are believed to be largely aquatic…
laelaps | February 3, 2009
The extinct whale Dorudon, from the new PLoS One paper.
When the English anatomist William H. Flower proposed that whales had evolved from terrestrial ungulates in 1883 he cast doubt upon the notion that the direct ancestors of early whales chiefly used their limbs for swimming. If they did, Flower reasoned, whales would not have evolved their distinctive method of aquatic locomotion, typified by vertical oscillations of their fluked tails. Instead Flower suggested that the stock that gave rise to whales would have had broad, flat tails that paved the way for cetacean locomotion as we know…
edyong | February 3, 2009Nine years ago, a team of fossil-hunters led by Philip Gingerich from the University of Michigan uncovered something amazing - the petrified remains of an ancient whale, but one unlike any that had been found before. Within the creature's abdomen lay a collection of similar but much smaller bones. They were the fossilised remains of a foetal whale, perfectly preserved within the belly of its mother. Gingerich says, "This is the 'Lucy' of whale evolution."
The creatures are new to science and Gingerich have called them Maiacetus inuus. The genus name is an amalgamation of the Greek words "…
ksharpe | February 3, 2009Review by John Wilkins, from Evolving Thoughts
Originally published on February 3, 2009, at 11:38 AM
"Freaks of Nature: What Anomalies Tell Us About Development and Evolution" (Mark S. Blumberg)
This book came to me well recommended, and as far as the content goes, I am very impressed. The writing style, however, and the intended audience, are at odds with each other.
Blumberg is a developmental biologist who has a real grasp of the topic, is enthusiastic about it, and has a clear target in his sights. That target is sometimes misleadingly called "The Modern Synthesis", although a better…
evolvingthoughts | February 3, 2009
"Freaks of Nature: What Anomalies Tell Us About Development and Evolution" (Mark S. Blumberg)
This book came to me well recommended, and as far as the content goes, I am very impressed. The writing style, however, and the intended audience, are at odds with each other.
Blumberg is a developmental biologist who has a real grasp of the topic, is enthusiastic about it, and has a clear target in his sights. That target is sometimes misleadingly called "The Modern Synthesis", although a better term might be something like "gene centrism"; the view often expressed in words like "genes are the…
grrlscientist | February 2, 2009tags: Darwin Day, Idaho Museum of Natural History, Darwin's Green Side: Discoveries in Evolutionary Botany, evolution, education, teaching, public outreach
Here's some interesting news: the Idaho Museum of Natural History asked permission to use some of my images from Darwin's Garden and Greenhouse photoessays for their Darwin Day celebration! (Do you remember my wonderful trip to London that you paid for?) The museum is presenting a special exhibit, Darwin's Green Side: Discoveries in Evolutionary Botany [free PDF], that focuses on Darwin's work with plants. If you live in Southern Idaho…
clock | February 2, 2009From the Regulator Bookshop:
Time: Tuesday, February 3, 2009 7:00 p.m.
Location: Regulator Bookshop
Title of Event: Rob Dunn
NCSU ecology professor Rob Dunn will discuss and sign copies of his new book, Every Living Thing: Man's Obsessive Quest to Catalog Life, from Nanobacteria to New Monkeys. Dunn, an engaging science popularizer, tells the exhilarating story of humanity's quest to discover everything about our natural world from the unimaginably small in the most inhospitable of places on earth to the unimaginably far away in the unexplored canals on Mars. For more information see the…
awild | February 2, 2009
Explaining the evolutionary tree of life is always a tricky proposition, as narratives are inherently linear but evolution spirals outwards in countless messy directions at once. To tell a story from the tangled bank requires picking a single thread and following it, yet it is precisely our tendency to follow single threads that causes so much misunderstanding of how evolution works.
Attenborough grapples with the problem using an animation that permeates the video, showing graphically the complexity of an ever dividing tree in the background as he traverses time from ancient to modern. …
jwhitfield | February 2, 2009We left Darwin in a troubled frame of mind. The fossil record seemed to offer little support to his theory (then again, it offered little support to any other theory). By the time we reach the end of chapter 10, 'On the geological succession of organic beings', he's feeling far more chipper:
"[A]ll the chief laws of palaeontology plainly proclaim, as it seems to me, that species have been produced by ordinary generation: old forms having been supplanted by new and improved forms of life, produced by the laws of variation still acting round us, and preserved by Natural Selection."
What…
jstemwedel | February 2, 2009
I've been derelict in my duty to inform you that 2009 has been declared the Year of Science, which is, of course, just an excuse to celebrate science-y goodness every day. Each month has a theme and a variety of options for exploring that theme.
For February, the theme is evolution (in part because some fellow named Darwin has a birthday this month). In addition to getting a good dose of Darwiniana, you can check in on scientists sharing their thoughts on evolution and science more generally, explore evolutionary thought and the process of evolution, look at the connections between…
pharyngula | February 2, 2009It's a bit too phenomenological, and definitely too animal-centric, but who cares? David Attenborough's tree of life is very pretty and gets the gist of the story of life on earth across.
pharyngula | February 1, 2009A few of us wild and crazy evo people, including Richard Dawkins, wrote up pieces for an issue of the BBC Focus magazine. You'll find me arguing with Steve Jones about whether evolution has stopped, Richard Lenski is highlighted, and Carl Zimmer makes an appearance. If you've got a flash player, you can read it online right now. It's pretty good stuff, if I do say so myself.
grrlscientist | February 1, 2009tags: David Attenborough, nature, evolution, environment, streaming video
David Attenborough is a reality-based person. For example, he sees evolution as the cornerstone of all the programs he has ever made. In this upcoming one-hour special that airs tonight at 9pm on BBCOne in the UK, David shares his personal view on Darwin's controversial idea. If you are one of the lucky ones to see this program (it airs in a few minutes, so turn on that TV!), please share your thoughts about it here, as I am sure us Americans would love to know a little more about what we've missed. [2:01]
clock | February 1, 2009
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grrlscientist | February 1, 2009tags: Birdbooker Report, bird books, animal books, natural history books, ecology books
"One cannot have too many good bird books"
--Ralph Hoffmann, Birds of the Pacific States (1927).
The Birdbooker Report is a special weekly report of a wide variety of science, nature and behavior books that currently are, or soon will be available for purchase. This report is written by one of my Seattle birding pals and book collector, Ian "Birdbooker" Paulsen, and is edited by me and published here for your information and enjoyment. Below the fold is this week's issue of The Birdbooker Report which…
amillikan | January 31, 2009In this week's episode of Science Saturday, John Horgan chats with philosopher Denis Dutton about his book, "The Art Instinct," which argues that our artistic values are due, in significant part, to biological adaptations dating back to the Pleistocene.
Next, John and Denis discuss sex and creativity, why there is no art of smell, and the appeal for highly abstract art.