Updated: 1 hour 12 min ago
Space wonders abound, from Saturn's gleaming moons to the skies over Mauna Kea, seen in the week's best space pictures.
Who was St. Patrick? What's a shamrock, really? Learn more about this green-themed holiday that heralds the start of spring.
Sunday's referendum on joining Russia is illegal, say leaders of the Tatar minority. Comprising about 12 percent of Crimea's population, these ethnic Sunni Muslims have a long, troubled history with Moscow.
10 U.S. Cities With High Natural Gas Leak Risk
Maybe you met pi in grade school. Maybe you didn't appreciate it. The magical, practical number that goes on forever and forever is celebrated on the day that matches its first digits: 3/14.
Animal advocacy groups get their messages out better than anyone else, thanks to the Internet and social media.
Kansas is not as flat as a pancake, despite common perceptions.
Thyroid cancer is being found in children from the area at a higher than normal rate. But that's not necessarily a cause for concern.
The most critical information about the Boeing 777's flight path is locked up in the black box on the aircraft.
National Geographic Your Shot photographs depict the haunting beauty of noctilucent clouds. New observations reveal their secrets.
A newly described extinct porpoise species had a pronounced underbite, the first seen in mammals.
Zach Hauser leaves his mark on the picturesque Verde Valley in Arizona by saving water on his farm.
At 20 feet long, the polar-dwelling Nanuqsaurus hoglundi measured about half the size of T. rex, a new study says.
The discovery of a 1,500-year-old Tequesta Indian village in downtown Miami has ignited a battle between developers of a hotel, restaurant, and movie complex and preservationists.
Room-size explosions can collapse older brick-and-mortar buildings in rapid fashion, say structural engineers.
A natural gas leak is suspected of causing a deadly explosion Wednesday in New York's East Harlem. Recent studies have shown that older cities with aging cast-iron pipes are at high risk.
A new study shows that we are far better at remembering what we see and touch than what we hear.
Last year more than 700 wildlife criminals were arrested in Nepal, thanks to a multilayered system of information gathering, enforcement, and swift justice.
New research suggests that volcanoes and other geothermal refuges may have sheltered life in Antarctica during glacial periods.
The notorious Asian carp has been found in the upper Mississippi.