Researchers have shown that space travel puts a powerful, dangerous squeeze on the fragile tips of optic nerves.
Using a new type of imaging, doctors were able to peer into the eyes of a young woman and see — on the cellular level — the type of damage that occurs from looking directly at the sun during an eclipse.
A tiny slowdown in Earth's rotation next year could trigger more earthquakes than usual, new research suggests.
NASA's OCO-2 satellite observed carbon dioxide response to one of strongest El Niños on record.
How does Harvey compare to 2005's Hurricane Katrina, one of the deadliest storms to ever strike the U.S.?
A total solar eclipse that will sweep across the United States on Aug. 21 is expected to make a noticeable dent in solar-energy collection, prompting energy workers to concoct workarounds that will help them meet energy demands.
In mid-March, snow and ice still frost the ground and winter's grip feels as strong as ever in many parts of the Northern Hemisphere.
Cases of Lyme disease in Michigan have risen dramatically in recent years, and a new study links that trend to larger and more widespread tick populations.