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 Caspian Sea is also classed as the world's largest lake.
52
In one day, a full grown redwood tree expels more than 2 tons of water through its leaves.
56
Europe is the only continent without a desert.
62
The water of the Antarctica is so cold that nothing can rot there.
334
Even Antarctica has an area code. It's 672.
58
It takes a drop of ocean water more than 1,000 years to circulate around the world.
61
The 'King Ranch' in Texas is bigger than the state of Rhode Island.
49