Aluminum used to be more valuable than gold!
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Marie Curie, the Nobel prize winning scientist who discovered radium, died of radiation poisoning.
57
Nylon is made from coal and petroleum.
42
Out of all the senses, smell is most closely linked to memory.
146
A ball of glass will bounce higher than a ball made of rubber.
73
Approximately 70 percent of the earth is covered by water. Only 1 percent of this water is drinkable.
65
Sound travels about 4 times faster in water than in air.
408
During photosynthesis, plants emit light humans can’t see, but NASA can see that light from space - and they've even made maps of it!
21