Brass doorknobs automatically disinfect themselves in about 8 hours.
18
Cellophane is not made of plastic. It is made from a plant fiber, cellulose, which has been shredded and aged.
44
The bark of an older redwood tree is fireproof.
65
The smell of freshly cut grass is actually a plant distress call.
31
Iron weighs more after it rusts.
16
Out of all the senses, smell is most closely linked to memory.
146
4.5 pounds of sunlight strike the Earth each day.
27
Each day, up to 150 species of life become extinct.
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