Sound travels fifteen times faster through steel than through air.
134
The smell of freshly cut grass is actually a plant distress call.
31
Research indicates that plants grow healthier when they are stroked.
173
Dr.Jonas Salk, the man who came up with the cure for polio, didn’t patent the drug. This made the drug more affordable to the general public, and he lost out an an estimated $7 billion dollars for himself.
41
Stannous fluoride, which is the cavity fighter found in toothpaste is made from recycled tin.
65
The bark of an older redwood tree is fireproof.
65
Only 12,000 years ago there was a species closely related to modern humans called Homo floresiensis that had been living on an Indonesian Island. They used fire and rather advanced tools, yet were only about 3 feet tall and weighed around 25kg.
15