Biology

Ribbon worms can grow to enormous lengths, and one named Baseodiscus the Eldest is showing how little we know about them—including how long they live

Spiders scare off predators by seemingly supersizing themselves

Scientists are just beginning to understand the signals that determine the length of dogs’ ears

Florida’s iguanas are an introduced species, and they aren’t used to the chilly temperatures the state is currently experiencing

The naturally mummified remains of dozens of cheetahs hidden deep in caves in Saudia Arabia shed light on where the animals lived in the past, which might inform rewilding efforts

Horses that were presented with cotton pads soaked in a scared human’s sweat showed more signs of fear themselves

Scientists have sequenced the genome of the long-extinct woolly rhinoceros from remains found in the stomach of a naturally mummified Pleistocene wolf pup

Mathematical tools from string theory are giving scientists a new way to study the networking of neurons

New clues hidden inside T. rex bones suggest that the carnivore lived longer lives than we thought

The very, very long-lived Greenland sharks were long thought to be practically blind. But a new study finds that they not only can see but also maintain their vision into old age

A new study suggests that primate facial expressions may not just be reflexive

Sea anemones and jellyfish don’t have brains, but the way their neurons behave during sleep shows some surprising similarities to humans