"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." When 2D puzzles are no longer exciting, 3D brain teasers are the way. These handheld puzzles require ...

I'm looking to get back into motorcycling, and that means digging out my Shoei RF-1200 helmet from the top shelf of my closet. It's a great helmet, comfortable and protective in equal measure, but it ...

In order to get tools and materials out of Earth's orbit and to space, NASA has to spend around $54,000 for about 2.2 pounds of material (via ScienceDaily). Because of this, scientists are always ...