Iron weighs more after it rusts.
68
At room temperature, the average air molecule travels at the speed of a rifle bullet.
55
Brass doorknobs automatically disinfect themselves in about 8 hours.
18
Approximately 70 percent of the earth is covered by water. Only 1 percent of this water is drinkable.
65
Scientists are now able to grow 'beating' heart tissue in a lab!
162
The average home creates more pollution than does the average car.
33
Sound at the right vibration can bore holes through a solid object.
134
Stephen Hawking once tried to find potential time travellers by throwing a party and only sending out invitations after the party.
17