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
There's a lake under Antarctica that is 25 million years old called Lake Vostok.
109
In one day, a full grown redwood tree expels more than 2 tons of water through its leaves.
56
It's still possible to see the division between East and West Germany due to different light bulbs.
5
If Manhattan had the same population density as Alaska, there would only be 15 people living there.
138
The Dallas/Ft. Worth airport is larger than New York City's Manhattan Island.
62
The longest cave in the world is the 'Mammoth Cave System' in the USA at 560,000 mtrs deep!
63