Forest fires move faster uphill than downhill.
52
The longest cave in the world is the 'Mammoth Cave System' in the USA at 560,000 mtrs deep!
63
Mexico City is built on top of an underground resevoir!
47
Australia's Great Barrier Reef is 1,250 miles long!
45
More than a dozen men have stood on the surface of the moon, but only three have been to Challenger Deep in the Marianas Trench, the deepest known spot in the ocean.
17
The state of Florida is bigger than England!
74
One cubic mile of seawater contains about 50 pounds of gold.
79
Every person in the world can fit in Texas and be given over 1000 sq ft in which to live.
14