Many mammals deliver in minutes after long pregnancies. See which species have the quickest births to help newborns thrive.

And that’s just distance runners. Catch a sprinter smashing a speed record and they look like they could keep up with a car chase. The current fastest human in the world is Usain Bolt, who can run at ...

"We've been tracking children's growth from birth all the way through to adulthood, and the fastest period of growth is clearly the first couple of years during infancy," Sean Cumming, a professor in ...

In the pursuit of space exploration, humans have broken records that were previously thought impossible. At the same time, terrible accidents have marred the history of space flight, making later ...