GOLDEN VALLEY, Minn. — Many of us know all too well about sleep (or lack thereof), and the art of catching Zzzzzs remains a mystery to scientists. Now, a little fish is giving us clues to the origins ...

A tiny fish is helping scientists understand how the anesthetic drug ketamine relieves depression. NPR's Jon Hamilton reports on research showing how ketamine altered the brain of a zebrafish. JON ...

VIB researchers at the Catholic University of Leuven have shown for the first time that new blood vessels do not grow in random directions, but that they are guided by specific signal molecules. This ...

Stingrays and zebra mbuna fish can perform simple addition and subtraction involving numbers between 1 and 5. Several studies have shown that fish can tell the difference between higher and lower ...

New research shows that the anesthetic ketamine keeps fish from giving up — and the way it works may help figure out how it works in humans and lead to better medications for depression. A tiny fish ...