36. The longest time between two twins being born is 87 days.
37. The world's deepest postbox is in Susami Bay, Japan. It is 10 metres underwater.
38. Light doesn't necessarily travel at the speed of light. The slowest we've recorded it move is 38 mph.
39. The Dutch village of Giethoorn has no roads - it is connected entirely with canals and footpaths.
40. In 2008, scientists discovered a new species of bacteria which lives in hairspray.
