In 1850, only 8% of the people in California were women.
0
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
It takes a drop of ocean water more than 1,000 years to circulate around the world.
61
The water of the Antarctica is so cold that nothing can rot there.
334
More than 25% of the world's forests are in Siberia.
51
The state of Florida is bigger than England!
74
The city of Houston, Texas is built on a swamp and is slowly sinking!
89