Why do bats hang upside down? Are vampire bats bloodthirsty man-hunters? Find out. When we busted this shaker flashlight open, we were amazed by all the cool stuff we found inside. Fireworks are amazing and beautiful. Learn how they light up the sky and find out how they're made.

Power Suits When comic book creators first conjured "Iron Man" in 1963, it's unlikely they imagined that real-world scientists would one day be taking a cue from their super hero -- but they are. Find out all about exoskeletons. A Walk in the Parks More than 275 million people visited our nation's National Parks last year for recreational purposes (meaning they went for fun). From Aniakchak to the Everglades, check out five amazing gems of the U.S. NPS. s.y.w.t.b. a … Hydrogeologist? Geologists do a lot more – way more – than study rocks. For example, some are researching global warming, while others are trying to make sure we have plenty of clean drinking water. Find out more in this article! PuzzleStuff Cool interactive games. Can you beat the computer?