NASA

Two Americans and a Russian have landed safely in Kazakhstan in a Russian Soyuz spacecraft after ending their 5-1/2 month stay at the International Space Station.

In a radical twist to NASA's accomplishments, British author Nick Redfern has raised many questions on the space agency efforts in exploring outer space, including the Apollo moon landings, the controversial face on Mars, UFO sightings and other secret space programs, in his new book NASA Conspiracies.

Researchers have found that one of the Jupiter's stripes that disappeared last spring is now showing signs of a comeback. The latest observations will help scientists better understand the interaction between Jupiter's winds and cloud chemistry.

Even as scientists are warning that the increasing global warming could be a threat to aquatic species, NASA researchers have determined that Earth's largest lakes have warmed during the past 25 years in response to climate change.