One 75-watt bulb gives more light than three 25-watt bulbs.
57
Sound travels about 4 times faster in water than in air.
408
Nylon is made from coal and petroleum.
42
Scientists are learning from the 1700-year-old Lycurgus Cup, which changes colour thanks to nano particles.
0
If you blowtorch Pepto-Bismol, you would get a hunk of metal.
114
Stephen Hawking once tried to find potential time travellers by throwing a party and only sending out invitations after the party.
17
The earth is approx. 6,588,000,000,000,000,000 tons.
175
A single cup of gasoline, when ignited, has the same explosive power as five sticks of dynamite.
57