The average ice berg weighs 20,000,000 tons!
54
Mexico City is built on top of an underground resevoir!
47
Israel's Dead Sea is 1,312 feet below sea level.
48
The Amazon rainforest produces more than 20% the world's oxygen supply.
182
Australia's Great Barrier Reef is 1,250 miles long!
45
Connecticut and Rhode Island never ratified the 18th Amendment (Prohibition).
25