This article was published in Scientific American’s former blog network and reflects the views of the author, not necessarily those of Scientific American When you launch a human body into space, ...

Add Yahoo as a preferred source to see more of our stories on Google. To figure out how long ago fish first appeared on Earth you need a way to measure really, really long time intervals. Clocks ...

Before a group of fish could live on dry land, they acquired the ability to breathe air. 385 million years ago, a group of fish would undertake one of the most important journeys in the history of ...