Queen baby names and what they mean, for queen, king, royal, ruler, crown, empress, emperor, royalty, conqueror.
Usain Bolt is the fastest man on the planet. He's the world record holder in the 100 and 200 metre sprints. We can easily calculate Usain Bolt's average speed.
At 3:21 p.m. (EDT), NASA'S Juno Mission spacecraft will slingshot around Earth towards Jupiter, accelerating to 25 miles per second along the way and becoming the fastest man-made object in history. A .50-caliber bullet travels at about half a mile a second, by contrast -- nowhere near the blistering speed of Juno.