Because heat expands the metal, the Eiffel Tower always leans away from the sun.
79
Stephen Hawking once tried to find potential time travellers by throwing a party and only sending out invitations after the party.
17
At 15 years old, Jack Andraka invented a method of diagnosing pancreatic cancer, thus helping to save the lives of millions of people around the world. It is 168 times faster, 26,000 times cheaper, 400 times more sensitive, and has a 99% success rate.
15
Sound travels about 4 times faster in water than in air.
408
Hot water can freeze faster than cold water.
181
Approximately 70 percent of the earth is covered by water. Only 1 percent of this water is drinkable.
65