The mystery of the disappearing elephant tusk Give it a few thousand years, and tusks could completely disappear from the Asian elephant (Elephas maximus). The beautifully smooth, elongated ivory incisors neatly bordering a long trunk are iconic in the public mind. The reigning hypothesis is that tusks evolved to help male elephants fight one another, as demonstrated when males compete over females in estrus. However, a recent study ...
Oct. 31, 2013 - Environmental News Network
Geoffrey Miller in New York Times It's highly controversial because it's science blurring the line between humans and other primates,Miller says, "but our results give clear economic evidence that human estrus actually does exist."