Déjà vu occurs when your brain tries to apply a memory of a past situation to your current one, fails, and makes you feel like it's happened.
12
When glass breaks, the cracks move faster than 3,000 miles per hour. To photograph the event, a camera must shoot at a millionth of a second!
114
All the gold ever mined could be molded into a cube 60 feet high and 60 feet wide.
38
You can hear the blood flowing through your ears if you find a quiet place and cover them tightly.
19
By raising your legs slowly and laying on your back, you can't sink in quicksand.
105
