Scientists have revived a flowering plant from a fruit stored away in permafrost by Arctic ground squirrel 32,000 years ago.
16
By weight, Bone is five times stronger than steel.
417
Between 2007 and 2012, Bill Gates gave away $28 billion; saving 6 million lives.
34
On Titan, Saturn's largest moon, the atmosphere is so thick and the gravity so low that humans could fly through it by flapping "wings" attached to their arms.
7