Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
118
One ragweed plant can release as many as one billion grains of pollen!
51
The smell of freshly cut grass is actually a plant distress call.
31
One barrel of petroleum holds 42 gallons.
20
Sound travels fifteen times faster through steel than through air.
134
A ball of glass will bounce higher than a ball made of rubber.
73
The only letter not appearing on the Periodic Table is the letter "J".
180
A cesium atom in an atomic clock beats over nine billion times a second.
43