Biology

A tiny snail discovered in a cave in southwestern China has become the first freshwater cave snail ever recorded within...

Viruses do not encounter a blank biological landscape when they infect humans. They meet an immune system shaped by thousands...

The world’s fastest-growing class of weight-loss medicines has reached a critical crossroads: millions of women of reproductive age are now...

Smithsonian researchers have reconstructed the most comprehensive evolutionary map yet of Hawaii’s honeycreepers, a spectacular group of birds whose rapid...

Moving an outdoor cat indoors may be far less disruptive than many owners fear, according to a new study from...

On Seram Island in Indonesia, an endangered cockatoo is at the center of an unusual conservation breakthrough. The Huaulu Indigenous...

For decades, the bonnethead shark’s distinctive shovel-shaped head has raised a deceptively simple question: why do males and females develop...

Snakes may be among nature’s most successful evolutionary experiments, but their origin has never followed a simple script. Today, more...

Butterflies are often treated as symbols of beauty, but their ecological importance is far more consequential. Because they respond quickly...

Intensive use of anthelmintic drugs is reshaping parasite populations in cattle, and a new study from Argentina has captured that...