The sheer size of some of the world's tallest buildings is just extraordinary. The current tallest, Guinness World Records reports, is the Burj Khalifa in Dubai, which stands at 2,716 feet, 6 inches ...

Add Yahoo as a preferred source to see more of our stories on Google. Image Credit: U.S. Department of Defense, Public Domain/Wiki Commons. Across land, sea, and sky, the biggest war machines ever ...

Rube Goldberg machines are a dime a dozen on the internet. A fact that doesn’t make the circuitous chain-reaction machines any less impressive, but does make them blend together. A new Rube Goldberg ...

WASHINGTON, D.C. -- Two of the largest machines ever conceived by scientists will be described today by one of the world's leading experts on particle colliders, the massive and expensive machines ...