Aluminum used to be more valuable than gold!
84
The smell of freshly cut grass is actually a plant distress call.
31
The most expensive material on the planet is antimatter - worth $62.5 trillion per gram.
18
Brass doorknobs automatically disinfect themselves in about 8 hours.
18
4.5 pounds of sunlight strike the Earth each day.
27
A ball of glass will bounce higher than a ball made of rubber.
73
Cold water weighs more than hot water.
93
One ragweed plant can release as many as one billion grains of pollen!
51