After more than two decades of drilling in Antarctica, Russian scientists have reached a gigantic freshwater lake hidden under miles of ice for some 20 million years - a pristine body of water that may hold life from the distant past and clues to the search for life on other planets.

The ancient Chinese exercise of tai chi improved balance and lowered the risk of falls in a study of people with Parkinson's disease.

People learned better when a key part of their brains got mild zaps of electricity, a finding that may someday help Alzheimer's patients keep more of their memories.

Trust your doctor? A survey finds that some doctors aren't always completely honest with their patients.

The ruins aren't particularly impressive, just some stone and clay footings for houses that probably supported walls of wood or clay wattle. And it's that very ordinariness that has experts excited.

An ocean experiment that was accidentally conducted amid the shipping silence after Sept. 11 has shown the first link between underwater noise and stress in whales, researchers reported Wednesday.

Researchers say an ocean experiment that was accidentally conducted amid the shipping silence after Sept. 11 has shown the first link between underwater noise and stress in whales.

Opening a scientific frontier miles under the Antarctic ice, Russian experts drilled down and finally reached the surface of a gigantic freshwater lake, an achievement the mission chief likened to placing a man on the moon.

The Million Veteran Program could help transform healthcare for veterans - and everyone else - by leading to new ways of predicting, preventing and treating illness.

NASA astronaut Janice Voss, who first worked for the space agency as a teenager and flew five shuttle missions in seven years, has died. She was 55.

Roger Boisjoly, a NASA contractor who repeatedly voiced concerns about the space shuttle Challenger before it exploded, has died. He was 73.

The man who warned his employer of the equipment quirk that led to the deadly explosion of the space shuttle Challenger has died. Roger Boisjoly was 73.