Quizzes
31 May 2014, 02:50 AM ET
Watermelons may be mostly water but these fruits are soaked with nutrients. See how much you know about these refreshing fruits.
31 May 2014, 02:40 AM ET
Sweet potatoes are a surprisingly nutritious vegetable. They are especially high in vitamins A, C, E, and B6, fiber and manganese. See how much you know about these special spuds.
23 May 2014, 12:26 PM ET
23 May 2014, 01:26 AM ET
22 May 2014, 08:34 PM ET
If you read this article, you should be able to score well on our quiz.
21 May 2014, 02:01 AM ET
Time to find out if you've been paying attention! Prove it by taking the time to take this quiz:
21 May 2014, 01:47 AM ET
Time to find out if you've been paying attention! Prove it by taking the time to take this quiz:
21 May 2014, 01:39 AM ET
Time to find out if you've been paying attention! Prove it by taking the time to take this quiz:
21 May 2014, 01:02 AM ET
09 May 2014, 02:25 AM ET
Spiny on the outside, sweet on the inside, pineapples are one fantastic fruit.
07 May 2014, 01:29 AM ET
If you read this article, you should be able to score well on our quiz.
12 May 2013, 02:00 PM ET
You've read about them. You've maybe even seen one on the road. But how much do you know about electric vehicles like the Nissan Leaf, the Chevy Volt, and the Tesla Roadster? Test your knowledge with this quiz.
11 May 2013, 09:40 AM ET
Test your knowledge of the Web and who is using it.
10 May 2013, 04:00 PM ET
Electricity makes our modern world possible, but how much do you really know about it? Take this quiz and find out.
04 May 2013, 12:00 PM ET
Technology is ubiquitous in modern life. But do you really know just how engrossed Americans are in the tech life?
03 May 2013, 06:00 AM ET
Can you recognize the science fiction origins of the following innovations?
17 March 2013, 11:29 AM ET
What's your precious metal IQ? Find out.
05 November 2012, 04:15 PM ET
How much do you know about furry, feathery and scaly White House inhabitants?
18 October 2012, 09:39 AM ET
How much do you know about the far-flung ice giant?
16 October 2012, 01:02 PM ET
How well do you know the solar system's rear planet?
15 October 2012, 03:15 PM ET
You don't have to be a genius to answer these questions about physicist Albert Einstein.
09 October 2012, 12:24 PM ET
Find out how much you know about this scientific award of all awards.
28 September 2012, 10:26 AM ET
These cosmic conundrums will challenge your knowledge of our home galaxy.
14 August 2012, 04:00 AM ET
How well do you know the largest planet in our solar system?
09 August 2012, 02:16 PM ET
How much do you know about the dizzying variety of dog breeds?
31 July 2012, 04:00 AM ET
How much do you know about the many worlds being discovered beyond our solar system?
30 July 2012, 11:00 AM ET
Find out your animal-sex IQ ...
27 July 2012, 04:00 AM ET
Curiosity is slated to touch down at Mars' Gale Crater on the night of Aug. 5.
26 July 2012, 04:00 AM ET
How much do you know about our solar system's major ring bearer?