Sound travels about 4 times faster in water than in air.
408
A single cup of gasoline, when ignited, has the same explosive power as five sticks of dynamite.
57
Forensic scientists can determine a person's sex, age, and race by examining a single strand of hair.
101
Stephen Hawking once tried to find potential time travellers by throwing a party and only sending out invitations after the party.
17
For a high school science fair project, 17-year-old Michio Kaku built a particle accelerator in his parent's garage that was able to generate a magnetic field 20,000 times greater than the Earth's and produce collisions powerful enough to create antimatter.
34
When you walk down a steep hill, the pressure on your knees is equal to three times your body weight.
199
Scientists in Germany have developed a candy that doesn't cause cavities.
11