Forest fires move faster uphill than downhill.
52
One cubic mile of seawater contains about 50 pounds of gold.
79
10 of the tributaries flowing into the Amazon river are as big as the Mississippi river.
41
The Dallas/Ft. Worth airport is larger than New York City's Manhattan Island.
62
In one day, a full grown redwood tree expels more than 2 tons of water through its leaves.
56
There's a lake under Antarctica that is 25 million years old called Lake Vostok.
109
More than 25% of the world's forests are in Siberia.
51
The longest cave in the world is the 'Mammoth Cave System' in the USA at 560,000 mtrs deep!
63