Evolution

About 70 percent of our planet’s surface is covered with water, and it plays an important role in our daily lives. But how did water get on Earth in the first place?

Scientists found eight species of nematodes living in California’s harsh Mono Lake—quintupling the number of animals known to live there. Christopher Intagliata reports.

By engineering mutations into fruit flies, scientists reconstructed how the bright orange butterflies came to tolerate milkweed toxins

Real megalodons weren’t nearly as enormous as their silver-screen counterparts

An experiment that partially revived slaughterhouse pig brains raises questions about the precise end point of life

Fossils and mathematical modeling are helping to answer long-standing questions about these bizarre animals 

A study suggests the phenomenon may have evolved from a mechanism for triggering ovulation

Chagnon’s views of the “fierce” Yanomamö and of the roots of war were more subtle than his critics or admirers suggested

A skull found in China reveals a previously unknown flying reptile

At 466 million years ago, the breakup of a large space rock may have led to major changes in our planet’s biodiversity

In animal studies, a set of 42 genes involved in neural development, learning and memory, and cognition seems to be associated with monogamy