A patient in a Dallas hospital has been found to have the Ebola virus, the first time someone has been diagnosed with the disease in the United States.
Annual Global Ocean Health Index includes the high seas for the first time, and scientists say the score could have been worse.
After a weekend eruption from Japan's Mount Ontake killed dozens of climbers this weekend, photographer Carsten Peter discusses the allure and danger of the pursuit.
Brine shrimp following a laser beam across a tank demonstrate how tiny swimming animals can influence ocean circulation.
Mini-pigs that grow big are abandoned or euthanized. Can education, regulation, and sanctuaries solve the problem?
A six-month search for frogs that hadn't been seen in decades brings some species back from the dead.
Studies also examine less certain connections to droughts and storms.
Ernesto Ráez-Luna explains why he left the government after it weakened the country's environmental laws.
More people are eating local and organic foods, but the planetary diet still is not sustainable.
John Krakauer calls current rehabilitation therapies medieval. Among his radical approaches: a cyber-dolphin named Bandit.
Dozens of hikers died after a volcanic eruption in central Japan over the weekend.
Japan's Mount Ontake, which erupted this weekend, belongs to a class of "stratovolcanoes," which form where one continental plates dives beneath another and are known for erupting at unpredictable intervals.
China now holds the world's record for largest cave chamber, a mapping team reports, overturning an old record.
A British "elephant whisperer" and his best beloved helpers waged guerrilla warfare and carried refugees to safety.
Peccaries are like pigs: They wallow. In the Peruvian rain forest, those mud puddles are wildlife magnets.
Now that kids worldwide have taken up their schoolbooks once again, we dug into the National Geographic archives for a look at reading around the world.
A recent debate at the Harvard-Smithsonian Center for Astrophysics highlights the ongoing uncertainty over how to define the word "planet."
Viking reenactors from Foteviken, Sweden, descend on the nearby town of Höllviken.
How did remote islands, now home to the world's largest marine reserve, come into U.S. possession? The story is for the birds, the bats, and their guano.
An Indian digital activist and a student in Seattle designed a way to empower people in the remote forests of northeast India.