Balsa wood is classified as a hard wood!
41
Stephen Hawking once tried to find potential time travellers by throwing a party and only sending out invitations after the party.
17
Cold water weighs more than hot water.
93
Each day is longer than the previous on by 0.00000002 seconds which is 13 seconds each century!
116
The Earth's atmosphere weighs about 5.5 quadrillion tons.
108
Brass doorknobs automatically disinfect themselves in about 8 hours.
18
The average home creates more pollution than does the average car.
33
Diamonds can be shattered with a hammer.
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