Two from the New York Times

Two from the New York Times

In Ducks, War of the Sexes Plays Out in the Evolution of Genitalia. Impressive.

If You Want to Know if Spot Loves You So, It’s in His Tail. The direction a dog wags its tail determines if it's a good wag or a bad wag. The article discusses the causes, and other animals with left/right biases.