10 of the tributaries flowing into the Amazon river are as big as the Mississippi river.
41
The Niagara Falls moves upstream at an average rate of about 295ft a century!
48
A volcano has enough power to shoot ash as high as 50 km into the atmosphere.
59
Australia's Great Barrier Reef is 1,250 miles long!
45
The warmest temperature ever recorded on Antarctica was 3 degrees F.
175
The longest cave in the world is the 'Mammoth Cave System' in the USA at 560,000 mtrs deep!
63
Due to gravitational effects, you weigh slightly less when the moon is directly overhead.
55
Louisiana is the only state that grows in land area every year (Due to alluvial deposits from the Mississippi River).
41