Because heat expands the metal, the Eiffel Tower always leans away from the sun.
79
The bark of an older redwood tree is fireproof.
65
In zero gravity, a candle's flame is round and blue.
16
One ragweed plant can release as many as one billion grains of pollen!
51
For every gallon of sea water, you get more than a quarter pound of salt.
45
Most dust particles in your house are made from dead skin!
67
Aluminum used to be more valuable than gold!
84
Every day, plants convert sunlight into energy equivalent to six times the entire power consumption of human civilization.
9