Explore Chennai's controversial dolphinarium, which ignited national debates on marine mammal captivity and animal welfare ethics.

Are any plants and animals evolving backwards by incorporating traits that they lost long ago? Joseph R., New Bedford, MA.

Most people know only two things about the appendix: You don’t need it – and if it bursts, you need surgery fast. That basic ...

Paleobiologist Geerat Vermeij is enthralled with mollusks. Their shells line the surfaces and fill the cabinets and drawers in his office on the second floor of the Earth and Planetary Sciences ...

For years, we suspected that Alvarezsaurids underwent a rare process of evolutionary miniaturization directly coupled to a ...

Roughly 425 million years ago, in the warm seas over what is now southern China, there lived a meter-long bony fish with jaws ...

Tiny fossill of purgatorius upper molar from Corral Bluffs in Denver. (Dr. Stephen Chester via SWNS) By Stephen Beech A ...

Scientists discovered some of the oldest bony fish fossils in China. The fossils explain the early history of animals with backbones.

Three tiny Purgatorius teeth found in Colorado are helping scientists trace how early primates evolved and spread across North America.

Human evolution has long been tied to growing brain size, and new research suggests prenatal hormones may have played a surprising role. By studying the relative lengths of index and ring fingers — a ...

In Lake Malawi, hundreds of species of cichlid fish have evolved with astonishing speed, offering scientists a rare opportunity to study how biodiversity arises.