The Amazon rainforest produces more than 20% the world's oxygen supply.
182
If Manhattan had the same population density as Alaska, there would only be 15 people living there.
138
It takes a drop of ocean water more than 1,000 years to circulate around the world.
61
Check your map! The Pacific entrance of the Panama Canal is farther East than the Atlantic entrance.
40
In one day, a full grown redwood tree expels more than 2 tons of water through its leaves.
56
The longest cave in the world is the 'Mammoth Cave System' in the USA at 560,000 mtrs deep!
63
There are more than 50,000 earthquakes throughout the world every year!
47
The average ice berg weighs 20,000,000 tons!
54