09 April 2015, 02:00 PM ET
Death by acid was the key killer in Earth's biggest mass extinction, some 251 million years ago.
09 April 2015, 11:32 AM ET
Scientists are working to unravel the mystery of a methane blob over the Four Corners region of the U.S. Southwest. The hot spot, first detected from space, contains a significant amount of the greenhouse gas.
09 April 2015, 08:51 AM ET
A pregnant giraffe at the Dallas Zoo is expected to give birth any day now, and the momentous occasion will be broadcast live online.
09 April 2015, 07:38 AM ET
A powerful portrait of plate tectonics took the top prize this year in NASA's annual photo tourney, called Tournament Earth.
09 April 2015, 07:35 AM ET
Each year, NASA's Earth Observatory runs its own March Madness contest at the same time as the basketball tourney, pitting the year's best Earth images against each other in a online contest. Here are the top eight, as selected by popular vote.
08 April 2015, 05:31 PM ET
A wide swath of the central United States is at risk of thunderstorms and possible tornadoes over the next couple of days, according to the National Weather Service (NWS).
08 April 2015, 03:00 PM ET
The nonprofit American Rivers has deemed the Colorado River in the Grand Canyon the most endangered river in America in 2015.
08 April 2015, 11:28 AM ET
A tiny flower pressed between layers of sandstone for more than 160 million years could be the earliest angiosperm fossil ever found.
08 April 2015, 10:25 AM ET
Though California is facing the worst drought on record, the future may not be catastrophic, if the state takes action now.
08 April 2015, 07:13 AM ET
Scientists plan to drill deep into the Chicxulub crater formed by a space rock that smashed into Earth 65.5 million years ago, killing off the dinosaurs.
07 April 2015, 01:32 PM ET
Very low levels of radioactive isotopes leaked from Japan's 2011 Fukushima nuclear disaster have been detected along the North American coast for the first time.
07 April 2015, 12:43 PM ET
A remarkable heat wave warmed Antarctica's northernmost peninsula to slightly above 63 degrees Fahrenheit (17.5 degrees Celsius) two weeks ago — a record high for the normally cold continent.
06 April 2015, 09:41 PM ET
Radio waves are a type of electromagnetic radiation. The best-known use of radio waves is for communication.
06 April 2015, 03:03 PM ET
Much of western Canada's glacial ice could disappear by the end of the 21st century.
06 April 2015, 02:09 PM ET
A Georgia Institute of Technology robotic vehicle, named Icefin, was deployed 1640+ feet below the Ross Ice Shelf to the seafloor and it found sea stars, sponges, anemones and more.
06 April 2015, 07:55 AM ET
For millennia, the salty, mineral-rich waters of the Dead Sea have drawn visitors and health pilgrims to its shores. But in recent years, gaping chasms have been opening up without warning along its banks, posing a threat to such visitors and tourism in g
06 April 2015, 07:52 AM ET
The Dead Sea, famous for salty water (almost 10 times as salty as the ocean), and for having the lowest elevation on Earth at 1,407 feet (429 meters) below sea level, is shrinking. And with it, giant sinkholes have been forming on its shores without warni
03 April 2015, 01:43 PM ET
To survive global warming, technology for survival needs to reach all nations.
03 April 2015, 08:17 AM ET
A new study has shown that although huge floods are rare in human lifetimes, they are responsible for sculpting the steep mountains in Colorado's semiarid landscape.
02 April 2015, 12:18 PM ET
A new map shows the distribution of lightning strikes across the Earth over the past two decades.
01 April 2015, 05:18 PM ET
The California snowpack is at a record low, and the state announced mandatory water restrictions today.
01 April 2015, 05:09 PM ET
The astronauts living and working on the International Space Station are eye to eye with a deadly super typhoon as it heads toward the Philippines.
01 April 2015, 04:46 PM ET
Stunning new global maps of rain and snow pummeling the planet were released by NASA today.
01 April 2015, 04:27 PM ET
The orbiting Global Precipitation Measurement (GPM) Constellation quantifies precipitation across the entire Earth. Data 'swaths' from 10 satellites overlay to form NASA's animated Integrated Multi-satellite Retrievals for GPM (IMERG).
01 April 2015, 07:38 AM ET
Antarctic octopuses survive subzero temperatures because of the blue pigments in their blood, a new study finds.
31 March 2015, 08:15 PM ET
Some city ants, like their human counterparts, are eating a junk-food-heavy diet.
31 March 2015, 04:10 PM ET
A new global map of water surface temperatures is so visually stunning that it easily may be mistaken for art.
31 March 2015, 12:51 PM ET
Sunset Crater, located in north-central Arizona, is the youngest volcano found on the 130,000-square-mile (337,000 square kilometers) Colorado Plateau. Check out these stunning images of an iconic geological feature in the Southwest.
30 March 2015, 07:51 AM ET
The Aral Sea is shrinking, leaving a dried-up white lakebed where there used to be blue water. But in the eyes of a radar satellite, the sea's shores look like a colorful abstract painting.
27 March 2015, 12:30 PM ET
In West Antarctica, some ice shelves could melt away within a century.
26 March 2015, 04:28 PM ET
The oddly calm tornado season owes a debt to the weather patterns responsible for the East's cold, snowy spring and the West's warm, dry drought.
26 March 2015, 11:53 AM ET
Colossal icebergs careening along the Antarctic coastline can shut down the deep, cold currents that help drive ocean circulation.