The Amazon rainforest produces more than 20% the world's oxygen supply.
182
The North Atlantic gets 2.5 centimetres (1in) wider every year.
119
The warmest temperature ever recorded on Antarctica was 3 degrees F.
175
One cubic mile of seawater contains about 50 pounds of gold.
79
A volcano has enough power to shoot ash as high as 50 km into the atmosphere.
59
The state with the longest coastline in the Continental U.S. is Michigan.
31