Planet Earth Archive
30 January 2015, 01:54 PM ET
A once-thriving Mesoamerican metropolis dried up about 1,000 years ago when below-average rainfall triggered centuries-long droughts that largely prompted people to abandon the city for greener opportunities, a new study finds.
30 January 2015, 01:35 PM ET
Layer by layer, scientists have filled in the hidden expanse of Greenland's vast ice sheet, revealing where the island hides its oldest ice.
29 January 2015, 06:52 AM ET
Astronaut Samantha Cristoforetti captured a jaw-dropping photo of Cyclone Bansi from the International Space Station.
28 January 2015, 07:40 PM ET
The greenhouse effect occurs when Earth's atmosphere traps solar radiation because of the presence of certain gases, which causes temperatures to rise.
28 January 2015, 03:33 PM ET
New research claims to have solved a messy paradox that has plagued geoscientists who study Earth's core and its life-protecting magnetic field.
27 January 2015, 12:05 PM ET
Trade-offs between optimising current and future reproduction are also common.
27 January 2015, 10:17 AM ET
Norway's Austfonna ice cap is shrinking faster than 20 years ago, especially in the region where the ice meets the sea.
26 January 2015, 06:19 PM ET
The blizzard about to wallop the northeastern United States could bring record snowfall to New York and other areas, forecasters say. But how does it stack up against some of the region's worst snowstorms in history?
26 January 2015, 05:04 PM ET
A warming world could mean interesting changes for major snowstorms, like the nor'easter this week.
26 January 2015, 02:33 PM ET
As the first blizzard of 2015 bears down on the Atlantic Coast, here are five stunning weather maps that highlight its massive impact.
26 January 2015, 02:21 PM ET
The weird weather phenomenon known as La Niña could occur nearly twice as often in the future as it does now, due to global warming, researchers say in a new study.
26 January 2015, 01:54 PM ET
The fierce nor'easter pummeling the East Coast today is occurring because of a perfect confluence of events.
26 January 2015, 12:28 PM ET
The NOAA GOES-13 satellite captured the massive winter storm bearing down on the east coast of the United States on Jan. 26th, 2015. GOES ‘sees’ infrared radiant energy and reflected visible light.
25 January 2015, 08:33 PM ET
As human activity alters the balance of nutrient cycles in nature, one mathematical biologist seeks answers to questions about how phosphorous pollution affects our lakes.
25 January 2015, 01:09 PM ET
Marine ecologist Paul Sikkel discusses his passion for and work with coral reefs and the best ways to protect them.
24 January 2015, 06:23 PM ET
Caroline Farrior uses math to understand the old plants play in the global carbon cycle so scientists will be able to predict the path of climate change.
23 January 2015, 07:25 PM ET
Marine ecologist Paul Sikkel explains why corals are important and how marine life thrives in protected areas.
23 January 2015, 04:29 PM ET
Hydraulic fracturing, commonly called fracking, is a drilling technique used for extracting oil or natural gas from deep underground.
23 January 2015, 12:10 PM ET
A mysterious crater discovered in East Antarctica last month likely formed beneath a meltwater lake, not because of a meteorite impact, researchers now think.
23 January 2015, 09:57 AM ET
The Yampa River — one of the few undiverted, largely natural rivers in the West — gets the Google Street View treatment in a new conservation effort.
23 January 2015, 09:42 AM ET
Google Maps users can now take a virtual raft trip down Colorado's Yampa River with a new Google Street View treatment of the river, created in partnership with the nonprofit American Rivers.
22 January 2015, 04:50 PM ET
Researchers were startled to find fish, crustaceans and jellyfish hidden beneath the Ross Ice Shelf, in one of the world's most extreme ecosystems.
22 January 2015, 04:47 PM ET
Photos of fish, amphipods and other creatures living under Antarctica's Ross Ice Shelf.
22 January 2015, 07:07 AM ET
Ever wondered why the smell of fresh rain is so evocative? Using high-speed cameras, scientists have now identified the physical mechanism behind it.
21 January 2015, 05:12 PM ET
The discovery of two lakes hidden beneath the Greenland ice suggests that climate change cuts to the bottom of the ice sheet.
21 January 2015, 01:41 PM ET
"It’s a result of human-induced global warming,” says NASA Goddard Space Flight Center's Steven Pawson referring to recently released data. Pawson notes how the cold East Coast winter and El Nino event had little effect on the rising temps.
21 January 2015, 12:38 PM ET
The ominous hands of the Doomsday Clock have been fixed at 5 minutes to midnight for the past three years. But they could move tomorrow.
21 January 2015, 11:55 AM ET
Melting glaciers pose another threat beyond sea level rise. They will dump massive amounts of organic carbon into the world's oceans, altering ecosystems.
21 January 2015, 07:02 AM ET
The massive Heart Mountain landslide in Wyoming raced to its final resting place on a cushion of carbon dioxide gas, similar to a hovercraft gliding on air, a new study suggests.
20 January 2015, 10:49 AM ET
Two new maps available for free download considerably improve estimates of land dedicated to agriculture, and provide the first global overview of field sizes.
16 January 2015, 11:24 AM ET
Believed to be caused by increasing human contribution of carbon dioxide and heat-trapping gases, the steady increase in average temperatures peaked yet again in 2014. Since 2000, the record for warmest year has been broken 10 times.