Ecological Niche Modeling And Finding Sasquatch's Range Distribution

Ecological Niche Modeling is a great tool for conservation biology, phylogeography and evolutionary...

Vaccine Wars: The Phantom Menace

It's been 9 months since I read Autism's False Prophets and participated in a discussion over at...

The Origins Of The Reductionist Program

The Origins of the Reductionist Program"How can the events in space and time which take place within...

Homo Floresiensis: Our Clown-Footed Cousins

I was fascinated by the discovery of the dwarfed hominin Homo floresiensis back in 2004 when it...

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John DennehyRSS Feed of this column.

I'm an evolutionary biologist and assistant professor at Queens College, City University of New York, who studies bacteriophage life history stochasticity and the population dynamics of host/pathogen

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Did you know even bacteria get old? Scientists traditionally assumed that bacteria were immortal, since these single-celled organisms split into two apparently identical daughter cells, which in turn divide, and so on. We now believe that this is not true. Eric Stewart of Northeastern University, and his colleagues took fluorescent images of individual E. coli cells over ten generations. Each generation the E. coli cells divide down the middle, giving each daughter cell one new tip and an old tip from its mother, or grandmother, or some older ancestor.

Human fetus

"The conflict between maternal and fetus genes is one of the weirdest ideas in the modern theory of evolution."* According to evolutionary logic, the fetus "wants" to milk the mother for all it can get; the mother "wants" to restrict the fetus to what it needs to survive and save something for future offspring. The reason is that the fetus benefits from every bit of help the mother gives, while the mother's return on her investment diminishes with increasing investment, (i.e. ever greater investment won't necessarily increase her fitness).