Balsa wood is classified as a hard wood!
41
Sound travels about 4 times faster in water than in air.
408
Scientists have revived a flowering plant from a fruit stored away in permafrost by Arctic ground squirrel 32,000 years ago.
16
For every gallon of sea water, you get more than a quarter pound of salt.
45
Your brain is 80% water.
525
Brass doorknobs automatically disinfect themselves in about 8 hours.
18
Most dust particles in your house come from dead skin.
48
Scientists aren't sure what color dinosaurs were.
312