Tsunamis ( tidal waves ) travel as fast as jet planes.
97
There's a love mattress that is specifically designed for couples who sleep on each other's arms.
12
Caffeine boosts memory.
405
You can start a fire with ice.
367
Stilts were invented by French shepherds who needed a way to get around in wet marshes.
45
Studies show that the colder the room you sleep in, the more likely you are to have a bad dream.
29
Every year around 1 billion Valentine cards are sent. After Christmas it's a single largest seasonal card-sending occasion.
14