In one day, a full grown redwood tree expels more than 2 tons of water through its leaves.
56
Forest fires move faster uphill than downhill.
52
The Caspian Sea is also classed as the world's largest lake.
52
It takes a drop of ocean water more than 1,000 years to circulate around the world.
61
Every person in the world can fit in Texas and be given over 1000 sq ft in which to live.
14
The longest cave in the world is the 'Mammoth Cave System' in the USA at 560,000 mtrs deep!
63
The Niagara Falls moves upstream at an average rate of about 295ft a century!
48