How Elite Tennis Players Crank Out Serves at 150 MPH

It’s early afternoon in Orlando, the hottest time of day on a characteristically sultry Wednesday in Florida, a state famous for its perennially warm, wet, shirt-soaking conditions, which just so happen to be pretty much perfect for playing tennis.Or so I’m told.I’m...

How to Solve a Rubik’s Cube in 5 Seconds—or Less

Even on my laptop’s tinny speakers, the sound is unmis­takable: the click-clacking, slip-sliding sound of a Rubik’s Cube whipping into shape. “It’s my first solve of the day,” says Australian speedcuber Feliks Zemdegs, somewhat sheepishly. It’s early in Sydney, where...