Spring-run Chinook's decline and loss connected to specific gene variation

Jellyfish undergo an amazing metamorphosis, from tiny polyps growing on the seafloor to swimming medusae with stinging tentacles

The finding could change ideas of how and when complex life evolved on Earth

World's first cannabis chromosome map reveals the plant's evolutionary past and points to its future as potential medicine

Two new fossil relatives of marsupials shed light on how a unique island ecosystem evolved some 43 million years ago

Saber-toothed cats with oral injuries ate softer foods than their uninjured counterparts, who may have provided injured cats with soft scraps

A new study says the colors found in modern birds' eggs did not evolve independently

When the male bearded manakin snaps its wings at lightning speed, it's more than part of an elaborate, acrobatic mating ritual

While coral reefs may be vital for diversification in present day, fragile near-shore environments were crucial for evolution some 480-360 million years ago

Although the study was performed on bats, it has implications for birds and insects