03 February 2014, 05:01 PM ET
Relative number of calories expended during 10 minutes of various Olympic activities.
14 January 2014, 01:08 PM ET
By surrounding their star with swarms of energy-collecting satellites, advanced civilizations could create Dyson spheres.
20 December 2013, 05:00 PM ET
Dec. 21, the winter solstice, is the shortest day of the year in the Northern Hemisphere and marks the beginning of winter.
19 December 2013, 09:23 AM ET
The Challenge is a series of tasks to test the capabilities of robots designed for disaster response in emergencies.
15 December 2013, 08:39 AM ET
The U.S. and China produce more total e-waste than any other country, according to a new map that tracks e-waste around the world.
26 November 2013, 07:16 AM ET
The challenge of managing the world's waste in the 21st century.
15 November 2013, 03:04 PM ET
Typhoon Haiyan dwarfed recent big storms, but wasn't the largest one recorded.
14 November 2013, 12:15 PM ET
E-cigarettes vaporize a flavored liquid rather than burning tobacco.
12 November 2013, 03:28 PM ET
Climate change threatens to reduce crop yields in much of the world.
30 October 2013, 06:13 PM ET
Drinking soft drinks alone gives teenagers more than the recommended maximum daily amount of sugar.
29 October 2013, 12:05 PM ET
A by-the-numbers look at the devastation caused by Hurricane Sandy.
18 October 2013, 04:46 PM ET
Facts about the different types of light bulbs.
17 October 2013, 07:00 PM ET
Common household chores may not burn as many calories as you think.
08 October 2013, 03:03 PM ET
Scientists are developing a theoretical process for resurrecting the extinct animals by genetically engineering elephants.
27 September 2013, 02:52 PM ET
The IPCC's 2013 report presents the strongest case yet that humans are responsible for the changes in the Earth's environment.
27 September 2013, 11:58 AM ET
The IPCC report found that “with 95 percent certainty” at least half of the observed warming could be accounted for by human activity.
26 September 2013, 12:48 PM ET
A recent poll shows that 15 percent of Americans don't use the Internet at all.
28 August 2013, 01:00 PM ET
Scientists can now grow functional mini brains for study.
26 August 2013, 01:40 PM ET
All about sex change surgeries.
22 August 2013, 09:32 AM ET
Scientists found that upcoming films with high Wikipedia activity tended to do well at the box office.
20 August 2013, 01:51 PM ET
Learn about the muscles that move your body and keep you alive.
14 August 2013, 04:38 PM ET
It lives in warm waters and can swim up your nose to your brain, but fortunately infections are rare.
12 August 2013, 07:43 PM ET
Hyperloop speeds capsules containing up to 28 passengers each through low-pressure tubes at just under the speed of sound.
12 August 2013, 06:05 PM ET
Elon Musk's Hyperloop tube system could get you there faster than a passenger airplane.
05 August 2013, 04:20 PM ET
The endocrine system produces hormones that regulate your body and mind.
05 August 2013, 04:11 PM ET
How the human body's urinary system works.
30 July 2013, 03:35 PM ET
The lymphatic system helps keep the body healthy by eliminating infections and diseases.
10 July 2013, 04:09 PM ET
Rare earths play a crucial role in the manufacture of modern electronics gear.
10 July 2013, 12:00 AM ET
A 2011 study ranked U.S. counties according to fitness of its citizens.
08 July 2013, 05:47 PM ET
A look at the disease-fighting immune system.
05 July 2013, 03:41 PM ET
Using a mouse is giving way to using your hands for interacting with the computer.
05 July 2013, 03:25 PM ET
How architects' ideas have developed about the mega-city of the future.