01 July 2013, 04:31 PM ET
New prosthetics and medical techniques are saving soldiers' lives after the battlefield.
27 June 2013, 03:39 PM ET
Drones are now being used by all sorts of military and civilian organizations.
18 June 2013, 11:34 AM ET
The process of creating 3D solid objects from a digital computer model.
21 May 2013, 03:19 PM ET
A chart of tornado deaths since 1875.
16 May 2013, 04:53 PM ET
Cloning can produce unspecialized stem cells that can be induced to grow into various types of body cells.
15 May 2013, 10:22 AM ET
The recommended 30 minutes of daily exercise could be cut to 7 minutes with a new high-intensity workout routine.
26 April 2013, 04:55 PM ET
Massachusetts was the first state to legalize gay marriage, in 2004.
22 April 2013, 05:50 PM ET
Only half polled knew what "fracking" was, and only 1 in 5 knew that nitrogen makes up most of Earth's atmosphere.
19 April 2013, 05:18 PM ET
Ammonium nitrate, a key ingredient in fertilizer, can be powerfully explosive under certain conditions.
08 April 2013, 07:00 PM ET
What Einstein called "spooky action at a distance" links pairs of particles even when separated.
26 March 2013, 02:51 PM ET
One of the most active volcanoes on Earth, Hawaii's Kilauea has erupted continually for more than 30 years.
25 March 2013, 10:02 AM ET
Pew Research Center polling found slightly more support for gay marriage than opposition to it.
18 March 2013, 05:06 PM ET
The skin is the largest organ of the body, and helps protect it from the environment.
18 March 2013, 01:16 PM ET
Find out about the workings of the brain and nerves.
10 March 2013, 03:35 PM ET
Huge stresses beneath the surface moved plates of the Earth's crust hundreds of feet horizontally and dozens of feet vertically.
01 March 2013, 04:25 PM ET
Find out all about the blood, lungs and blood vessels that make up the circulatory system.
28 February 2013, 03:26 PM ET
Explore the entire Earth's surface from highest peaks to mysterious depths.
19 February 2013, 05:08 PM ET
A study by the Pew Research Center shows that the total number of Catholics in the world has tripled in the past century.
07 February 2013, 02:00 PM ET
This tiny squirrel-sized creature would later evolve into a diversity of mammal species including humans.
04 February 2013, 04:31 PM ET
Find out all about your stomach and how digestion works.
04 February 2013, 12:57 PM ET
Find out all about your lungs and how breathing works.
04 February 2013, 12:38 PM ET
All about your body's skeleton, the framework of bones that keeps you together.
23 December 2012, 05:40 PM ET
More than a thousand tornadoes strike the U.S. annually.
07 December 2012, 05:14 PM ET
Nearly every month of 2012 was warmer than in nearly every one of the years recorded since 1895.
20 November 2012, 02:13 PM ET
The dangers in introducing icy frozen turkeys to a pot of searing hot fry oil. Just part of our wall to wall Thanksgiving coverage.
13 November 2012, 09:57 AM ET
How Solar Eclipses Work: When the moon covers up the sun, skywatchers delight in the opportunity to see a rare spectacle.
05 November 2012, 04:00 PM ET
The deadliest hurricane in the period since 1851 hit Texas in 1900 and claimed 8,000 lives.
01 November 2012, 04:06 PM ET
Follow the path of hurricane Sandy as it casuses more than 150 deaths and billions of dollars in damages.
30 October 2012, 09:20 PM ET
A look inside the giant heat engine that keeps a hurricane alive.
29 October 2012, 01:32 PM ET
Hurricane Irene was a billion-dollar disaster, but it is dwarfed in terms of size by Hurricane Sandy.
22 October 2012, 01:07 PM ET
If you took the ice in all of Earth's mountain glaciers, it would make a cube with 34-mile-long sides.
16 October 2012, 12:35 PM ET
Learn about T. rex's massive teeth, bones, habitat and other dinosaur secrets.