Add Yahoo as a preferred source to see more of our stories on Google. Human ancestors may have fallen to about 1,280 breeding individuals nearly 930,000 years ago, reshaping our genetic history.

Human newborns arrive remarkably underdeveloped. The reason lies in a deep evolutionary trade-off between big brains, bipedalism and the limits of motherhood. Why is it that, compared to most other ...

Forbes contributors publish independent expert analyses and insights. I write about biodiversity and the hidden quirks of the natural world. For most of human history, green eyes didn’t exist.