The Amazon rainforest produces more than 20% the world's oxygen supply.
182
Mexico City is built on top of an underground resevoir!
47
Due to gravitational effects, you weigh slightly less when the moon is directly overhead.
55
A volcano has enough power to shoot ash as high as 50 km into the atmosphere.
59
Forest growth in the US has exceeded harvest since the 1940’s. Today, we have more trees than any time in the past 100 years.
14
In 1850, only 8% of the people in California were women.
0
Europe is the only continent without a desert.
62
More than a dozen men have stood on the surface of the moon, but only three have been to Challenger Deep in the Marianas Trench, the deepest known spot in the ocean.
17