An earthquake on Dec. 16, 1811 caused parts of the Mississippi River to flow backwards.
243
One cubic mile of seawater contains about 50 pounds of gold.
79
Due to gravitational effects, you weigh slightly less when the moon is directly overhead.
55
In one day, a full grown redwood tree expels more than 2 tons of water through its leaves.
56
A waterfall known as The Devil's Kettle empties water into a hole and nobody knows where it ends up!
18
Europe is the only continent without a desert.
62
The longest cave in the world is the 'Mammoth Cave System' in the USA at 560,000 mtrs deep!
63
It's still possible to see the division between East and West Germany due to different light bulbs.
5