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.
ABOVE: © ISTOCK.COM, ROBUART
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

rays

Oceanic Shark and Ray Numbers Down 71 Percent over Past 50 Years
Lisa Winter | Jan 28, 2021
Overfishing is the biggest factor driving these species toward extinction, researchers conclude from a new study.