Meet the Manx Loaghtan: a Bronze Age sheep with four horns, Viking history, and a genetic secret only recently uncovered.

Tomato clownfish, in response to an unpredictable world, appear capable of adjusting when they lose their stripes based on cues from other fish and their habitat, a new study in PLOS Biology finds.

The sky has a way of mesmerizing us with its vastness and beauty. But now and then, it takes a turn for the eerie, casting strange and unsettling hues that leave us in awe and sometimes in fear. These ...