Sperm counts have been decreasing for decades. Nobody seems to know why it’s happening, and not much is being done to find out, but we could be facing a public health disaster

Italian astronomers have detected a shallow body of liquid water beneath the planet’s South Polar ice cap

Physics has lost its way argues a prominent German scientist

With only two living females, the Northern white rhino is functionally extinct. Now, scientists are attempting to use assisted reproductive technology to save it

There’s a taste of the sublime in the photograph of this extrasolar world

New calculations shed light on one of science’s great puzzles

Earlier this year Prospect science writer Philip Ball had his own “mini-brain” grown in a laboratory. Researchers now plan to put the method to different use, and in doing so learn more about an...

Northern and southern Chinese think differently—and the reason goes back centuries

A full damage limitation plan should have been drawn up months ago

The unsettling story of a (literal) thought experiment