Synthetic corneas prove successful

The collagen-based implants could be an alternative to cadaver corneas. A preliminary test shows that they restored vision as effectively as the latter and did not require anti-rejection drugs.

Lucy the Butcher? Tool Use Pushed Back 800,000 Years

Early human ancestors may have been using tools about 800,000 years earlier than thought, according to a new study based on newfound bone evidence—prehistoric leftovers linked to the famed "Lucy" fossil's species.

Giant "Terror Birds" Used Their Heads Like Hatchets

Phorusrhacids have been extinct for millions of years, yet the so-called terror birds just got a bit more frightening.

"Thor's Hammer" Found in Viking Graves

Long dismissed as accidental additions to Viking graves, prehistoric "thunderstones"—fist-size stone tools resembling the Norse god Thor's hammerhead—were actually purposely placed as good-luck talismans, archaeologists say.

Ancient Human-Bone Sculptors Turned Relatives Into Tools?

Femurs and skulls of freshly dead used to make buttons, combs, scientists say.

Your Hair Reveals Whether You're a Morning Person

Early bird or late riser? The mysteries of your sleep cycle may be unlocked by the hairs on your head, a new study says.

That's because the genes that regulate our body clocks can be found in hair-follicle cells, researchers have discovered.

Deep-sea images reveal colorful life off Indonesia

Scientists using cutting-edge technology to explore waters off Indonesia were wowed by colorful and diverse images of marine life on the ocean floor — including plate-sized sea spiders and flower-like sponges that appear to be carnivorous.