The Amazon rainforest produces more than 20% the world's oxygen supply.
182
Mexico City is built on top of an underground resevoir!
47
The water of the Antarctica is so cold that nothing can rot there.
334
A volcano has enough power to shoot ash as high as 50 km into the atmosphere.
59
The city of Houston, Texas is built on a swamp and is slowly sinking!
89
The water between India and Sri Lanka is only 3-30 feet deep and was purportedly passable on foot until 1480 AD when a cyclone moved some sand around.
1