For the first time ever, the Oklahoma Department of Wildlife Conservation has confirmed the presence of reproducing female mountain lions in Oklahoma — a historic milestone in the state’s wildlife ...

Add Yahoo as a preferred source to see more of our stories on Google. When you buy through links on our articles, Future and its syndication partners may earn a commission. A microscope image of the ...

Scientists are making inroads in understanding one of the central mysteries of human reproduction: Why do women’s eggs deteriorate as they age? The broad strokes have been well-known - the ticking of ...