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 Pith: In this post I review a paper which covers the evolutionary dimension of human childbirth. Specifically, the traits and tendencies peculiar to our species, the genes which may underpin those ...

Human evolution is explained through branching lineages rather than a simple linear progression. Fossils, genetics, and ...

Laugh all you want now about Grandma's 8 p.m. bedtime; after reading this, you might just want to thank her. One team of researchers report that older adults' earlier body clocks may have evolved to ...

The hot flashes, the hair loss, the bone depletion … menopause isn't fun. But you aren't alone: Shamu felt it, too. New research from Fisheries and Oceans Canada and the University of Exeter has shown ...