and the instincts of the neuters in the different species of the same genus are often different. All who believe in the principle of evolution will admit that with social insects the closely ...

A mother rat’s care for her pup reaches all the way into her offspring’s DNA. A young rat that gets licked and groomed a lot early on in life exhibits diminished responses to stress thanks to ...

In my book Tenacity in Children, I explore the unholy trinity—three primal instincts deeply embedded in our evolutionary biology: rigid belief, fear of difference, and defensive aggression.