Iron weighs more after it rusts.
16
Oak trees produce 2,200 acorns in a season, but each acorn only has a 1 in 10,000 chance of becoming an oak tree.
304
Research indicates that plants grow healthier when they are stroked.
173
Hot water can freeze faster than cold water.
181
Scientists have revived a flowering plant from a fruit stored away in permafrost by Arctic ground squirrel 32,000 years ago.
16
4.5 pounds of sunlight strike the Earth each day.
27
Because heat expands the metal, the Eiffel Tower always leans away from the sun.
79
One cubic foot of gold weighs more than 1,200 pounds!
78