At room temperature, the average air molecule travels at the speed of a rifle bullet.
55
Iron weighs more after it rusts.
68
Each day is longer than the previous on by 0.00000002 seconds which is 13 seconds each century!
116
Stephen Hawking once tried to find potential time travellers by throwing a party and only sending out invitations after the party.
17
The smell of freshly cut grass is actually a plant distress call.
31
Sound travels fifteen times faster through steel than through air.
134
The hair of an adult man or woman can stretch 25 percent of its length without breaking.
116