10 of the tributaries flowing into the Amazon river are as big as the Mississippi river.
41
The Niagara Falls moves upstream at an average rate of about 295ft a century!
48
If Manhattan had the same population density as Alaska, there would only be 15 people living there.
138
In 1850, only 8% of the people in California were women.
0
The average ice berg weighs 20,000,000 tons!
54
If Antarctica's ice sheets melted, the worlds oceans would rise by 60 to 65 metres (200 - 210ft) - everywhere
181
The Atlantic Ocean is saltier than the Pacific Ocean.
54