Evolution

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Category archives for Evolution

JBS Haldane is said to have responded to a question about how evolution could be disproved by saying, “A Precambrian rabbit”. What was meant by this, of course, is any substantial discovery that greatly disrupted the evidence for the chronological pattern of descent observed in Earth’s life. That pattern of descent is one of the…

Homosexuality and evolution

I made the mistake of reading some of the comments on those last youtube videos. There were some good ones, but they were also laced with the usual grunting assholes complaining about gays and “trannies” and quoting the Bible and making racist remarks about Africans. Let us pass over those contemptible arguments; there’s no dealing…

Sometimes, people email me with good questions. Here’s one. When I was a kid, my own visualization of evolution was Lamarckism. But I didn’t know it. In reading Dawkins and others, I know it doesn’t exist. But it seems this article is claiming it does to some extent. Can you comment? I’m curious as to…

Islamists have brain leeches!

Susan Blackmore always lectures entertainingly — really, if you get a chance to hear her, you should — so I can guess how surprised she was when students claimed offense and walked out on her talk. They were religiously indoctrinated, and simply shut down their brains when the word “evolution” came up, and when she…

Why do cavefish lose their eyes?

It’s another Dawkins question! Why do cave-dwellers lose their eyes? They’re useless, but are they harmful? Costly to make? Or eroded by rain of uncorrected mutations? I thought I’d already addressed this in a blog post long ago, but I searched, and I didn’t — it was my inaugural column in sadly defunct Seed magazine,…

Ophelia has summarized a series of science questions Richard Dawkins asked on Twitter. Hey, I thought, I have answers to lots of these — he probably does, too — so I thought I’d address one of them. Maybe I can take a stab at some of the others another time. I like this one, anyway:…

How we got here

It’s been 25 years since Gould’s Wonderful Life: The Burgess Shale and the Nature of History crystallized the debate over the importance of contingency in evolution, most famously illustrated by his metaphor of “replaying the tape of life”. If we could roll back the history of life on earth and restart it in the pre-Cambrian,…

2 + 2 = 17, for certain values of 2

A while back, I responded to Behe/Luskin’s claim that his model proving the impossibility of evolution of chloroquinone resistance was vindicated. I pointed out (as did Ken Miller) that showing that a particular trait required multiple point mutations did not affect the probability in the naive way that Behe and Luskin calculated — in particular,…

I like this hypothesis

But we have to be clear that it is only a hypothesis at this point. I was reading about domestication syndrome (DS) — selecting animals for domestication has a whole collection of secondary traits that come along for the ride, in addition to tameness. We are selecting for animals that tolerate the presence of humans,…

They don’t understand allometry!

I think the engineers are just trying to wind me up, again. Joe Felsenstein tackles a paper published in an applied physics journal that redefines evolution and tries to claim that changes in aircraft design are a good model for evolution. It’s a terrible premise, but also, the execution is awful. But permit me a…