It's a big topic of discussion at an annual convention for trade in endangered species.
Antibiotic-resistant bacteria is now a universal health crisis, so the United Nations is searching for a fix.
UFO hunters aren't the only ones on the lookout.
Laws that ban China from cooperating with NASA stem from concerns over national security and human rights abuses.
We're already seeing one of the first indicators of climate change: changing habitats.
No astronaut has ever been too far away to see Earth, but that will change if we send them to Mars and beyond.
The rusty patched bumblebee population has declined about 87 percent in recent years.
After watching a Clinton speech, one doctor concluded the candidate needs more neurological tests.
This discovery could help us pinpoint where earthquakes are most likely to occur.
The Senate is reportedly looking to protect NASA's plans for Mars from the uncertainty of this election.
The couple pledged more than $3 billion to help cure, prevent or manage all diseases that affect us now.
A new report found that excess levels of chromium-6 have been found in the drinking water provided to most Americans.