One barrel of petroleum holds 42 gallons.
20
Research indicates that plants grow healthier when they are stroked.
173
Stephen Hawking once tried to find potential time travellers by throwing a party and only sending out invitations after the party.
17
4.5 pounds of sunlight strike the Earth each day.
27
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
The hair of an adult man or woman can stretch 25 percent of its length without breaking.
116
Sound travels about 4 times faster in water than in air.
408
In zero gravity, a candle's flame is round and blue.
16