Tag Archives: Behavioral Biology

Chimpanzee Food Sharing

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Is chimpanzee food sharing an example of food for sex?

i-3691706735948748b5a89f0a306951ac-chimp_share_tree.jpgOne of the most important transitions in human evolution may have been the incorporation of regular food sharing into the day to day ecology of our species or our ancestors. Although this has been recognized as potentially significant for some time, it was probably the Africanist archaeologist Glynn Isaac who impressed on the academic community the importance of the origins of food sharing as a key evolutionary moment. At that time, food sharing among apes was thought to be very rare, outside of mother-infant dyads. Further research has shown that it is in fact rare … the vast majority of calories consumed by human foragers in certain societies and at certain times of the year comes from a sharing system, while the fast majority of calories consumed by chimpanzees is hand to mouth without sharing.

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Deborah Gordon: How do ants know what to do?

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Armed with a backhoe and a handful of markers, Deborah Gordon studies ant colonies in the Arizona desert. She asks: How do these chitinous creatures get down to business — and even multitask when they need to — with no language, memory or visible leadership? Her answers could lead to a better understanding of all complex systems, from the brain to the Web. Continue reading Deborah Gordon: How do ants know what to do? →

Robert Wright: How cooperation (eventually) trumps conflict

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Author Robert Wright explains “non-zero-sumness,” a game-theory term describing how players with linked fortunes tend to cooperate for mutual benefit. This dynamic has guided our biological and cultural evolution, he says — but our unwillingness to understand one another, as in the clash between the Muslim world and the West, will lead to all of us losing the “game.” Once we recognize that life is a non-zero-sum game, in which we all must cooperate to succeed, it will force us to see that moral progress — a move toward empathy — is our only hope.

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Why is There no Birth Control Pill for Men?

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i-fc0baa42c324cefa8495fdb0044234b2-dice.jpg Why is there no Birth Control Pill for men?This latest “Ask a ScienceBlogger” question will certainly engender a wide range of responses from the Scienceblogs.com team. Answers may address physiology, endocrinology, pharmacology, economics, and other areas of scientific thinking and practice. The answer I’d like to propose can be summed up in two closely linked words pilfered from the question itself: Continue reading Why is There no Birth Control Pill for Men? →

Reduced Verbal Ability in African American Children

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Blogging on Peer-Reviewed ResearchAfrican American children may have reduced verbal ability compared to other children to a degree that is roughly equivalent to missing a year in school, according to a recently published paper. Is this evidence of a racial difference?The study by Sampson et.al., published in the Proceedings of the National Academy of Sciences included more than 200 children aged 6-12 living in Chicago, and followed these children over seven years. The study controlled for poverty, and interestingly, poverty was not found to be a good predictor of differences in verbal ability. Continue reading Reduced Verbal Ability in African American Children →

Neanderthal Childhood. Did it happen?

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Blogging on Peer-Reviewed Research

Every few years a paper comes out “explaining” short stature in one or more Pygmy groups. Most of the time the new work ads new information and new ideas but fails to be convincing. This is the case with the recent PNAS paper by Migliano et al.

From the abstract:

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Life history trade-offs and human pygmies

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Blogging on Peer-Reviewed Research

Every few years a paper comes out “explaining” short stature in one or more Pygmy groups. Most of the time the new work ads new information and new ideas but fails to be convincing. This is the case with the recent PNAS paper by Migliano et al.

From the abstract:

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Human Evolutionary Rate Study

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There seems to be some interesting things going on with the recently reported study of rates of evolution in humans. We are getting reports of a wide range of rather startling conclusions being touted by the researchers who wrote this paper. These conclusions typically come from press releases, and then are regurgitated by press outlets, then read and reported by bloggers, and so on. Here is, in toto, the press release from the University of Wisconsin, where John Hawks, one of the authors of the study, works. I reproduce the press release here without further comment. Continue reading Human Evolutionary Rate Study →

Topi or not Topi …

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Blogging on Peer-Reviewed ResearchGo to any bar and you’ll see a lot of males standing and sitting around not mating. I’ll bet you would have guessed that the reason they are not mating is that no females will mate with them for one reason or another. But there is the distinct possibility that they are very inconspicuously resisting mating opportunities. It turns out that males can do this …. avoid mating without conspicuous resistance … more easily than females. For obvious reasons.This could be why what has become (inappropriately) known as “reversed sexual aggression” often goes unnoticed, and a recent study of the African antelope Damaliscus lunatus (a.k.a. “topi”) explores this possibility. Continue reading Topi or not Topi … →