These Are The Only Planes Fast Enough To Outrun The Earth's Rotation

If you're in the right plane, can you start out in daylight and circle the Earth without ever seeing darkness? Sure, you can ... but you'll need plenty of fuel.
IFLScience on MSN

Can You Solve The Latest Math Puzzle Circling The Internet?

We all love a mathematical brainteaser here at IFLS. Monty Hall? Done it mate. Two circles shoved into a quadrilateral of unknown size? Been there, solved that. Some Singaporean kids’ seemingly ...