illustration of yellow fish with red stripe down its back
Can These Fish Do Math?
Scientists find that two species can be trained to distinguish quantities that vary by one.
Can These Fish Do Math?
Can These Fish Do Math?

Scientists find that two species can be trained to distinguish quantities that vary by one.

Scientists find that two species can be trained to distinguish quantities that vary by one.

ABOVE: © ISTOCK.COM, ROBUART
Stingrays
smalleye stingray marine ocean biology animal wildlife largest photo id identification migration long distance
Image of the Day: Photo ID
Chia-Yi Hou | Jun 27, 2019
Marine biologists identify smalleye stingrays using the white spots on their backs.
Stingrays Chew Too
Ben Andrew Henry | Sep 15, 2016
Researchers observe stingrays moving their jaws to grind up prey, a behavior thought to be restricted to mammals.