Updated: 23 min ago
As world population projections soar, there are rising concerns about the impact billions more people will have on the planet.
Federal officials weigh arguments on President Obama’s proposal to expand the Pacific Remote Islands Marine National Monument.
Flip through nine pictures of these marine mammals in honor of sea otter awareness week.
The fast-spreading King fire is raising concerns about climate change's role in making droughts more frequent and wildfires more intense.
India faces pressure to cut emissions even as its new prime minister is promising to boost energy access. Can a push for renewable energy achieve both goals?
Astronomers catch the blue light from a pulsar, a hurricane makes landfall, and an exoplanet sucks the life out of its star in the week's best space pictures.
The red planet beckons like never before, with a host of nations planning Mars missions.
U.S. aid to fight Ebola in West Africa could build trust in the health care system, helping to stop the epidemic and save the faltering economy.
The nation's farmers are 17 years older than the average American worker, with younger would-be farmers hobbled by rising costs of land and technology.
Rural areas, far-flung islands, and industrial cities the Yes side needed to win all voted to stay in the U.K.
The country will restart its controversial scientific whaling program next year.
Dueling projections of population growth present different visions of the world's future.
Humble soil bacteria may help farmers grow more crops to feed the world.
A man attacked and killed by a bear in a remote forest in Wyoming is a reminder to always be prepared around the animals.
Shakespeare got it wrong. A new study shows Richard III died for want of a helmet, not a horse.
Artificial sweeteners might unexpectedly increase blood sugar levels in some people, a study of gut microbes suggests.
As the epic drought persists, the state decides to limit groundwater pumping—but not before the 2020s at the earliest.
After the nuclear disaster at Chernobyl in 1986, more than a thousand square miles were abandoned, inspiring the curious and adventurous to sneak into the exclusion zone.
Residents await a slow-moving threat from the Kilauea volcano.
A new study suggests that people evolved distinct faces because this variability eases recognition.