23 October 2013, 06:13 PM ET
In this experiment, you will determine the relative humidity using wet-bulb and dry-bulb thermometers. Such a device is called a psychrometer.
23 October 2013, 03:09 PM ET
So much for "Rat Island." A remote island west of Alaska has been renamed to Hawadax Island since the birds have returned more quickly than expected.
23 October 2013, 02:26 PM ET
The small earthquakes repeatedly shaking Oklahoma are likely linked to wastewater disposal from oil and gas extraction, known as fracking, according to the U.S. Geological Survey.
23 October 2013, 12:06 PM ET
Ships and industrial activity is drowning out the noise of whales in certain areas of the British Columbia coast, a new study shows.
23 October 2013, 11:48 AM ET
A tiny flying drone has captured images of 300-year-old coral surrounding an island that is part of American Samoa. The new technique could be used to map the world's reefs.
22 October 2013, 05:26 PM ET
Finding a giant oarfish on the beach is a rare occurrence, since the fish is a deepwater species that's rarely seen at all. Some are claiming that oarfish washing ashore is a sign that an earthquake will soon follow. Can animals predict earthquakes?
22 October 2013, 05:21 PM ET
Images from Lyons, Colo., a mountain town temporarily cut off from the world during flooding in September 2013. The flooding left the town unlivable for the time being.
22 October 2013, 03:12 PM ET
Fires in New South Wales, Australia, have been stoked by record high temperatures and record low moisture, with gusting winds making flames unpredictable and dangerous. Hundreds of homes have been destroyed in the Blue Mountains outside of Sydney.
22 October 2013, 02:25 PM ET
One year ago, what would become Superstorm Sandy, one of the worst hurricanes in U.S. history, first formed in over the Caribbean Sea.
22 October 2013, 01:34 PM ET
In the tradition of Alec Baldwin and Sean Penn, Andean bears aren't afraid to stand up to the glaring camera lens of paparazzi. New images from a protected jungle in Bolivia show a group of the bears dismantling a camera trap.
22 October 2013, 01:27 PM ET
Australia's massive wildfires have sparked billowing pyrocumulus clouds — menacing columns of water vapor and smoke that tower over raging firestorms.
22 October 2013, 01:07 PM ET
The ozone hole over Antarctica reached its biggest extent last month, clocking in at almost twice the size of Europe. Still, the phasing out of harmful chemicals in the atmosphere has reduced the size of the ozone hole over the last two decades.
22 October 2013, 11:48 AM ET
Two satellites snapped pictures of Hurricane Raymond of the Pacific coast of Mexico just a day apart, -- it was only a tropical storm one day, but a major hurricane the next.
22 October 2013, 11:00 AM ET
Tiny particles of gold have been found in the leaves and other parts of eucalyptus trees in Australia. Though they aren't mineable themselves, these finds could point to gold deposits deep underground.
22 October 2013, 10:14 AM ET
US carbon dioxide emissions have dropped for the fifth year in the last seven, with the second largest yearly drop seen since 1990, according to newly released government numbers.
22 October 2013, 01:43 AM ET
Part of the problem is that prevention isn’t sexy or flamboyant. There are no pictures of “grateful people” who are recovering, or villains to blame.
21 October 2013, 07:44 PM ET
Mount McKinley, also known as Denali, rises more than 20,000 feet above sea level.
21 October 2013, 07:05 PM ET
The casualty list continues to grow for U.S. Antarctic science. Research projects are being canceled as the NSF deals with the consequences of the government shutdown.
21 October 2013, 06:46 PM ET
In total, the items for sale — which also included meteorites, fossils and an elephant-bird egg — brought in a little more than $2 million, short of the total gleaned from a similar auction in June, which brought in more than $3.57 million.
21 October 2013, 05:20 PM ET
Throughout the year the Antarctic hole in the ozone layer (defined as less than 220 Dobson Units) grows and recedes seasonally, reaching it's maximum size this year on September 26th.
21 October 2013, 05:12 PM ET
A home on Seattle's steep and scenic slopes comes with a hidden risk. The next earthquake on the Seattle Fault, which cuts under the heart of the city, could trigger many more deadly landslides than previously predicted.
21 October 2013, 05:10 PM ET
The wildfires threatening Sydney and other parts of New South Wales, Australia, are finding fuel in eucalyptus forests, which many experts blame for wildfires that have blazed through the hills of California and other places.
21 October 2013, 03:11 PM ET
For the second time in a week, a rarely seen type of deep-sea creature was found along the coast of California. The carcass of a 14-foot oarfish washed ashore in Oceanside, Calif., on Friday, days after a bigger one was discovered off Catalina Island.
21 October 2013, 03:02 PM ET
The Amazon rain forest's dry season lasts longer than it did 30 years ago, and the likely culprit is global warming, a new study finds.
21 October 2013, 10:58 AM ET
A four-acre strip of land in Canada that has probably never been visited by humans wins the haphazard title. Located at exactly 69.793° N, 108.241° W.
20 October 2013, 08:52 AM ET
Fields of bright, blooming sunflowers are a sure sign of summer turning into autumn in many areas around the world where they are grown. See photos and learn about sunflowers here.
18 October 2013, 05:23 PM ET
A new approach is helping fight both hunger and overfishing in Mozambique.
18 October 2013, 05:02 PM ET
Energy security may come not from new oil wells or wind turbines, but from improved efficiency.
18 October 2013, 03:04 PM ET
Countries tallying their total greenhouse gas emissions can now get a better estimate thanks to two new reports adopted this week by the Intergovernmental Panel on Climate Change.
18 October 2013, 12:03 AM ET
Can the U.S. protect its environmental health without a truly representative republic?
17 October 2013, 03:14 PM ET
The largest and most diverse rain forest in the world, the Amazon, is dominated by just a few dozen species of trees, with the majority of the other species being relatively rare.
17 October 2013, 03:08 PM ET
With government cash flowing again, the U.S. Antarctic research program is scrambling to reverse the science shutdown forced into place last week.