Science

A Calculating Win for China's New Supercomputer

China's "Tianhe-2" (Milky Way 2) supercomputer took first place in one recent speed test, clocking in at 30 quadrillion calculations per second--about twice as fast as the best American machines. The U.S. still has more supercomputers than any other nation, but some experts say computer speed is a measure of a country's scientific innovation, and worry the U.S. is lagging behind.

Goodnight Moon, Goodnight Math

Should you skip the bedtime stories and do math problems instead? Laura Overdeck, the founder of "Bedtime Math," thinks so. Overdeck discusses her program for tucking kids in with equations, and tells why she thinks it helps kids keep up their math skills over summer vacation.