Brass doorknobs automatically disinfect themselves in about 8 hours.
18
In Montreal, there's a bus stop with swings that play musical notes when you swing on them.
20
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
By weight, Bone is five times stronger than steel.
417
There's a swing on the edge of a cliff in Ecuador. It has no safety measures and is called the 'Swing at the End of the World'.
22
Scientists have revived a flowering plant from a fruit stored away in permafrost by Arctic ground squirrel 32,000 years ago.
16