Quizzes
14 June 2012, 04:00 AM ET
Space Shuttle Countdown
11 June 2012, 04:00 AM ET
07 June 2012, 04:00 AM ET
How well do you understand weather and our climate and the difference between them?
06 June 2012, 04:00 AM ET
Take our quiz on the reusable space plane. How much do you know?
01 June 2012, 04:00 AM ET
October 4, 2007 marks the 50th anniversary of the launch of the manmade satellite. How well do you remember the past half-century in space? Take this 10-question quiz and test your knowledge of space history.
01 June 2012, 02:00 AM ET
Test your knowledge of Venus facts.
31 May 2012, 02:00 AM ET
For most of human history, the moon spawned awe and fear, but we know a lot about it today. How much do you know?
30 May 2012, 02:00 AM ET
Do you know basic facts about the planet closest to the sun?
29 May 2012, 08:31 AM ET
As an any astronaut will tell you, life in space is a lot like life on Earthwith some very important differences. On Earth, for example, if you leave your fork floating in air while you grab for your spoon, it will quickly hit the floor.
29 May 2012, 02:00 AM ET
How much do you know about some goofy claims about Mars?
28 May 2012, 02:00 AM ET
What do you know about your home planet?
23 May 2012, 04:48 PM ET
How much do you really know about birth control?
17 May 2012, 01:53 PM ET
Prove how much you known about weather oddities.
01 May 2012, 04:45 PM ET
How much do you know about mummification and mummies?
20 April 2012, 01:00 PM ET
How much do you know about the story behind your species, Homo sapiens?
20 April 2012, 12:10 PM ET
What do you know about your home planet?
17 April 2012, 06:48 PM ET
What do you know about the mysterious creatures said to lurk in forests, lakes and oceans around the world?
10 April 2012, 03:53 PM ET
Try your hand at a little paleontology.
09 April 2012, 02:40 PM ET
Diseases are devastating some wildlife, such as frogs and bats. See if you understand what's going on.
06 April 2012, 12:14 PM ET
How well do you know your religion trivia?
06 April 2012, 11:16 AM ET
What's your IQ when it comes to flying saucers and the unexplainable?
27 March 2012, 06:24 PM ET
How much do you know about how living things — from fungi to to fish — produce their own light?
22 March 2012, 03:42 PM ET
Find out what you know about how the human body works.
21 March 2012, 03:40 PM ET
What do you know about the popularity of names?
15 March 2012, 10:42 AM ET
Test yourself on your knowledge of animal vision.
13 March 2012, 06:13 PM ET
Test your knowledge of the strangest and most controversial moments in U.S. election history.
09 March 2012, 03:33 PM ET
An hour forward in spring, an hour back in fall, do you get it?
09 March 2012, 10:40 AM ET
How much do you know about the 3-letter word?
05 March 2012, 12:00 PM ET
How well do you understand weather and our climate and the difference between them?
02 March 2012, 06:40 PM ET
What do you know about the Pill, condoms and other methods of birth control?
02 March 2012, 03:44 PM ET
See what you really know about these useful inventions.
01 March 2012, 03:45 PM ET
How much do you really know about sexually transmitted diseases?