Sound travels fifteen times faster through steel than through air.
134
If the chemical sodium is dropped into water it will immediately and violently explode.
67
Out of all the senses, smell is most closely linked to memory.
146
Nylon is made from coal and petroleum.
42
The earth is approx. 6,588,000,000,000,000,000 tons.
175
Because heat expands the metal, the Eiffel Tower always leans away from the sun.
79
0.3% of solar energy from the Sahara is enough to power the whole of Europe.
310
Oak trees produce 2,200 acorns in a season, but each acorn only has a 1 in 10,000 chance of becoming an oak tree.
304