Fire up the 2013 remix of the Eagles "Desperado". Listen to the beat: That's 60 beats per minute, or to an engineer, 1 Hertz (Hz). Lady Gaga's "Just Dance" is around twice that. It sounds fast, but ...

Humanity is closer than ever to catastrophe, according to the atomic scientists behind the Doomsday Clock. The ominous metaphor ticked one second closer to midnight this week. The clock now stands ...