Australia's Great Barrier Reef is 1,250 miles long!
45
The names of the continents all end with the same letter with which they start, excluding the North and South infront of AmericA.
86
Due to gravitational effects, you weigh slightly less when the moon is directly overhead.
55
A volcano has enough power to shoot ash as high as 50 km into the atmosphere.
59
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
The Amazon rainforest produces more than 20% the world's oxygen supply.
182