A long-disputed rule in biology says bigger is better, but a new computer model illuminates why that’s not necessarily true. By Lauren Leffer Published Jan 18, 2024 11:45 AM EST Get the Popular ...

If we look across the whole of the mammal branch of the tree of life, we find there are many groups of mammals that have evolved testicles of all different sizes. In almost all these separate cases, ...

The evolution of the so-called Dread Risk response has been explained by new scientific research. People often respond to low-probability, high-consequence events ...

Randolph Nesse, MD, is a research professor of life sciences at Arizona State University. For more about evolutionary medicine, see the International Society for Evolution, Medicine and Public Health.

This blog entry is about one of my many pet peeves. Essentially, there is much literature examining correlates of sex differences in a specific behavior that claim to provide a test of one ...

A loving relationship can be an oasis in uncertain times, but nurturing it requires attention, honesty, openness, vulnerability, and gratitude. This blog entry is about one of my many pet peeves.