Genetically engineered mice furnished with fluorescent proteins are providing the most detailed pictures yet of the brain's intricate circuitry.

A newly discovered digging creature reveals that mammals evolved the cut-and-grind molars that make them so successful at least two separate times.

The Nature Conservancy has blasted through 1950s-era levees in the Williamson River Delta in southern Oregon to save the wetlands and endangered fish species.

A bat-loving English couple has turned a spare bedroom into a bat hospital. The United Kingdom protects all of its 17 bat species.

New studies have found that autumn leaf color is related to the richness of soil and that poorer soils sport redder trees.

Astronauts install a solar panel on the International Space Station and consider extending their mission.

HIV came straight to Haiti from Africa, then traveled to the United States and much of the rest of the world, suggests a new study into the mysterious history of AIDS.

A stargazer's retreat, Deerlick Astronomy Village has strict lights-out rules so vacationing astronomers can get a better view of the Georgia sky.

Astronauts enter a new module they have attached to the International Space Station. They conduct a second space walk and plan for a third.

Sumatran orangutans, Miss Waldron's red colobuses, and Peruvian yellow-tailed woolly monkeys are among the world's most endangered primates, according to a new report.

Astronauts begin spacewalk to install international space station's new live-in module

A medieval church on wheels, a Great Wall fashion show, and a Chinese moon mission are among the week's eye openers.

Discovery shuttle astronauts begin the difficult job of attaching an Italian-made module to the International Space Station. The project is expected to take ten days.

How much Earth's climate will change due to global warming is inherently unpredictable, a new study argues.

An Indian state is implanting microchips under the skin of all its captive elephants as part of a project to register and keep track of the animals.