Iron weighs more after it rusts.
16
Neanderthal man had a brain capacity 100cc larger than modern man's.
50
Scientists have developed a microparticle filled with oxygen that can be injected into the blood stream, enabling us to live without breathing.
21
Brass doorknobs automatically disinfect themselves in about 8 hours.
18
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