Forest fires move faster uphill than downhill.
52
Australia's Great Barrier Reef is 1,250 miles long!
45
10 of the tributaries flowing into the Amazon river are as big as the Mississippi river.
41
The Caspian Sea is also classed as the world's largest lake.
52
The average ice berg weighs 20,000,000 tons!
54
The Atlantic Ocean is saltier than the Pacific Ocean.
54
More than 25% of the world's forests are in Siberia.
51
There are approximately three chickens for every human on Earth.
13