How Much Longer Can Earth Support Life?
The Tissint meteorite brought some of the Red Planet to Earth in a big way.
The largest public meteorite auction ever held opens in Manhattan in October.
Discoveries of Martian meteorites have been increasing, as have their prices.
Climate change is politics, not scientific, say former astronauts, others from NASA.
Letters, manuscripts and documents from the Albert Einstein Archives are being made available.
For the first time satellite data provides a comprehensive picture of melting ice.
A quiet sun didn't stop the Earth from absorbing more energy than it released back into space.
Dead vegetation has revealed clues to a cold spell that gripped Europe and elsewhere.
The South Pole is not the only pole to have its own ozone hole now, scientists report.
Sophisticated, but Earthly, technology may be responsible for recent crop circles.
Future research on the Red Planet will focus on searching for signs of alien organisms.
NASA appears to have pulled an experiment to expose monkeys to radiation to study its effects on astronauts.
PETA has obtained heavily redacted documents discussing plans to expose monkeys to radiation to study its potential effects on astronauts.