A ball of glass will bounce higher than a ball made of rubber.
73
The smell of freshly cut grass is actually a plant distress call.
31
Sound travels fifteen times faster through steel than through air.
134
According to studies, men change their minds two to three times more often than women.
72
Pumice is the only rock that floats on water.
14
When you walk down a steep hill, the pressure on your knees is equal to three times your body weight.
199
The bark of an older redwood tree is fireproof.
65
In the 60s, a scientist gave LSD to dolphins in an attempt to teach them English.
17