A cubic yard of air weighs about 2 pounds at sea level.
31
Balsa wood is classified as a hard wood!
41
Scientists have revived a flowering plant from a fruit stored away in permafrost by Arctic ground squirrel 32,000 years ago.
16
Most dust particles in your house are made from dead skin!
67
Indoor pollution is 10 times more toxic than outdoor pollution.
62
If you blowtorch Pepto-Bismol, you would get a hunk of metal.
114
One 75-watt bulb gives more light than three 25-watt bulbs.
57
Out of all the senses, smell is most closely linked to memory.
146