Category Archives: Evolutionary Biology

The Falsehoods

Biology is harder to learn than quantum physics. Why? Because most people think they totally get biology, but everyone knows nobody gets quantum physics. Therefore, any effort to explore quantum physics will result in new learning, but people rarely learn new biology. The bottom line is that our brains are full of biology, which would be good if most of it did not consist of falsehoods.
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The Natural Basis for Inequality of the Sexes

Is the Natural World a valid source of guidance for our behavior, morals, ethics, and other more mundane areas of thought such as how to build an airplane and what to eat for breakfast?1 When it comes to airplanes, you’d better be a servant to the rules of nature (such as gravity) or the airplane will go splat. When it comes to breakfast, it has been shown that knowing about our evolutionary history can be a more efficacious guide to good nutrition than the research employed by the FDA, but you can live without this approach and following FDA guidelines will not do you in. A naturalistic approach can work when it comes to behavior too, but there are consequences. You or someone you love would probably not like the consequences.
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The Science of Lion Prides

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Although the paper addresses Tanzanian lions, this is a photograph of a Namibian lion
Starting some years ago, we began to hear about revisions of the standard models of lion behavioral biology coming out of Craig Packer’s research in the Serengeti. One of the most startling findings, first shown (if memory serves) as part of a dynamic optimization model and subsequently backed up with a lot of additional information, is the idea that lions do not benefit by living in a group with respect to hunting. They live in groups despite the fact that this sociality decreases hunting effectiveness. This is a classic case of “but wait, I can see it with my own eyes!” vs. data.

ResearchBlogging.orgSome of the most recent work done by Packer’s team has just been highlighted in a pretty nice write up by Mattt Walker in the BBC, representing a paper just coming out. The most interesting finding: Male lions kill (or attempt to kill) females from neighboring prides in order that their own pride obtains numerical superiority in pursuit of territorial competition.
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BBC: DNA mutations followed by selection does not lead to new species!?!?

In an BBC article describing a Royal Society paper on the rate of mutation in warm vs. cooler climates, the BBC made this statement:

DNA can mutate and change imperceptibly every time a cell divides and makes a copy of itself.

But when one of these mutations causes a change that is advantageous for the animal – for example, rendering it resistant to a particular disease – it is often “selected for”, or passed down to the next few generations of that same species.

Such changes, which create differences within a population but do not give rise to new species, are known as “microevolution”.

I suppose the BBC is into the Hopeful Monster theory or something.

Read it here, come back, and fight it out.

Ultimate Causes, Proximate Mechanisms

Why does a soldier throw himself on a hand grenade to save the lives of a half-dozen unrelated fellow soldiers? Why does someone run into a burning building they happen to be passing to save a child they don’t know? From a Darwinian perspective these seem to be enigmatic behaviors that would “select against” such individuals (or more properly, select against the heritable component of this behavior).

There are several possible explanations for this….
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More emotional intelligence = more orgasms

ResearchBlogging.orgAccording to a study just coming out in the Journal of Sexual Medicine, “variations in emotional intelligence–the ability to identify and manage emotions of one’s self and others–are associated with orgasmic frequency during intercourse and masturbation.”

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