Planet Earth Archive
25 February 2015, 02:45 PM ET
The climate-changing greenhouse effect exists and has been directly measured in the United States.
24 February 2015, 05:43 PM ET
Stunning ice caves off the coast of Lake Superior may open to visitors this weekend if conditions are right.
24 February 2015, 05:33 PM ET
Stunning ice caves off the coast of Lake Superior may open to visitors this weekend if conditions are right.
24 February 2015, 01:05 PM ET
NASA's Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observation (CALIPSO) satellite shows wind blown Saharan dust nourishes plants with phosphorus, which is in limited supply in the Amazon.
24 February 2015, 12:54 PM ET
Mysterious flooding and high tides along the East Coast in 2009 and 2010 now have an explanation: a major change in the Atlantic Ocean's wind patterns and warm-water currents.
20 February 2015, 04:42 PM ET
An Arctic blast sweeping across the East Coast, from Canada south to Florida, left much of the country blanketed in ice and snow this week.
19 February 2015, 04:50 PM ET
As if the outdoors weren't harsh enough with Boston buried under ungodly amounts of snow and the rest of the Northeast unable to shake the bitter cold, more winter weather is on the way. So what's behind this extreme chill?
19 February 2015, 04:27 PM ET
Hot and humid cities can birth more summer thunderstorms than rural areas in the Southeast.
19 February 2015, 05:26 AM ET
A bizarre sheet of clouds embraced the highest peak in the Grand Teton National Park in Wyoming last week, enchanting even the park's most seasoned visitors.
18 February 2015, 12:32 PM ET
A staggering 292.8 million visitors toured a national park, seashore or historic site in 2014, topping the previous record of 287.2 million visits set in 1987.
18 February 2015, 09:15 AM ET
Scientists found that microbes may have used nitrogen to survive on the ancient Earth, suggesting other planets that may have been habitable for just a short period, such as Mars, may have been able to support life.
18 February 2015, 06:47 AM ET
The radical raindrops travel faster than their terminal velocity, surprising scientists who aren't sure how the droplets are able to fall from the skies so quickly. The finding could mess with rainfall and erosion estimates, the researchers added.
17 February 2015, 08:26 AM ET
One of the richest beds of manganese nodules ever found on the Atlantic seafloor was discovered last month while trolling for deep-sea creatures between South America and Africa.
17 February 2015, 08:20 AM ET
Colorful satellite maps show how ocean acidification varies across the globe, a first step toward monitoring this side effect of climate change from space.
16 February 2015, 01:16 PM ET
Two new deltas are growing by the year in southern Louisiana, bucking the trend of land loss seen for decades in this Gulf Coast state. The deltas may hint at how to save Louisiana's coastline.
14 February 2015, 02:37 PM ET
The United States Environmental Protection Agency (EPA) alerts the public about how plastic is a real detriment to the environment.
13 February 2015, 12:30 PM ET
DNA tests have confirmed that an endangered gray wolf killed in Utah in December was the same lone wolf that had been spotted and photographed near Arizona's Grand Canyon, the U.S. Fish and Wildlife Service announced this week.
13 February 2015, 08:32 AM ET
Milky white rain poured down on eastern Washington state and northeast Oregon on a wintery morning last week.
13 February 2015, 12:13 AM ET
More schools are divesting from fossil fuels, a trend that appears to be accelerating.
12 February 2015, 05:26 PM ET
Megadroughts are droughts that last for more than 10 years. A new study finds that megadroughts are likely to strike the Southwest and Central Plains between 2050 and 2100.
12 February 2015, 02:00 PM ET
Scientists study ancient trees to learn about past droughts.
12 February 2015, 02:00 PM ET
Before this century ends, the Southwest and Central Plains states could shrivel under decades-long megadroughts worse than those that ended the Ancestral Pueblo civilization millennia ago.
12 February 2015, 12:53 PM ET
Extreme architecture for extreme environments.
12 February 2015, 07:02 AM ET
Two new studies explain why some regions of the country are rattling more than others as oil and gas production rises.
11 February 2015, 04:37 PM ET
The polar vortex is sending cold air to the East again. Research continues into role warming might play.
11 February 2015, 03:32 PM ET
Lower ocean pH levels are impairing coral skeleton growth, making it easier for mollusks, worms and sponges to do some serious damage.
11 February 2015, 01:00 PM ET
A massive outpouring of carbon dioxide from the deep ocean helped end the last ice age, scientists report today.
10 February 2015, 07:36 PM ET
A greenhouse gas is any gaseous compound in the atmosphere that is capable of absorbing infrared radiation, thereby trapping and holding heat in the atmosphere.
10 February 2015, 05:20 PM ET
Scientists at NYU are using lollipops to help understand how materials dissolve. "Flowing fluids generate unique shapes through erosion or dissolution," according to NYU assistant professor Leif Ristroph.
10 February 2015, 03:59 PM ET
Geoengineering offers solutions and risks but reducing emissions is still the best way to address climate change.
10 February 2015, 02:05 PM ET
Millions of years before LSD and rock and roll, dinosaurs munched on psychedelic fungus, a new study suggests.
10 February 2015, 08:30 AM ET
The eruption of volcanoes buried beneath Iceland's glacier may have triggered a series of megafloods that carved a giant canyon in a period of days, new research suggests.