From opera singers to toadfish, vertebrates may use basically similar circuitry for controlling vocal muscles.

Outsized brains may have sped up evolution of body size in birds.

First big species audit finds coral extinction risks severely under-reported

The 60th meeting of the International Whaling Commission defers voting on deadlocked issues

Scientists take a new look at what drives female damselflies to look like males.

A jellyfish-like hydrozoan with a novel power to rewind its life cycle has been spreading rapidly around the world’s oceans without anyone taking much notice, researchers say. The life history of Turritopsis dohrnii takes such twists and turns that only a new genetic analysis has revealed that the creature is invading waters worldwide, says Maria Pia Miglietta of Pennsylvania State University in University Park. The first peculiarity of the seven species of Turritopsis had inspired biologists to describe these hydrozoans as “potentially immortal.” The adults form filmy...

International commission meets after soul-searching on years of dispute.

Female chimps tend toward silent sex when the other girls could overhear.

Leaves mostly keep their cool (or warmth) wherever they live, a finding that might affect reconstructions of past climates.

Chinook salmon, dwindling in the United States, go wild in South America.

A one-two sting and a cockroach lets a wasp lead it like a dog on a leash.

Wasp attack creates undead caterpillars that protect wasp young

Long-delayed U.S. government summary of climate change science sees effects on energy, transportation, farming, and water.

Researchers have found an unexpected number of two-female nests in Oahu’s bird colony.