Just as the ocean is full of plankton, the air we breathe teems with microorganisms.
How does this mysterious precipitation form?
Lodestones are dull, lumpy, and slate-gray, but their “magnetic intelligence” made them fabulously expensive.
Curiosity rover's recent report of methane on Mars isn't the first time the gas has been indicated. Does it necessarily mean that Mars harbors life?
Some archaeologists argue it’s essential to preserve the history of lunar exploration. But would it represent a claim of U.S. sovereignty over the moon?
The zone above 8,000 meters is known among mountaineers as the “Death Zone.” Why do most deaths in the high mountains occur at these extreme heights?
In the mid-20th century, the United States government invested in two major projects designed to control hurricanes by seeding the storm clouds.
Millions of people now live atop fault lines because long ago small communities gathered at fresh water sources.
Scientists and weather forecasters have been trying to understand tornadoes for over 100 years, but the average advanced warning is still only 14 minutes.
Does an increase in satellites mean we soon won't be able to see the stars?