When a feline gets threatened, it engages in a suite of behaviors that seem to have the purpose of facilitating its own survival. A cat will growl angrily. It will arch its back. And even the fur on ...

Why do we find natural scenes like green fields, trees, and rivers beautiful? Why do people have an urge to gain wealth and power? Why do human beings fight wars? Why are human beings creative?

This article was published in Scientific American’s former blog network and reflects the views of the author, not necessarily those of Scientific American Evolutionary Psychology suffers from a PR ...