A ball of glass will bounce higher than a ball made of rubber.
73
Out of all the senses, smell is most closely linked to memory.
146
The smell of freshly cut grass is actually a plant distress call.
31
A single speck of dust is half way in size between a subatomic particle and the Earth.
15
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
The only letter not appearing on the Periodic Table is the letter "J".
180
When you walk down a steep hill, the pressure on your knees is equal to three times your body weight.
199
The force of a suction cup is calculated using F=AP.
15