If Manhattan had the same population density as Alaska, there would only be 15 people living there.
138
One cubic mile of seawater contains about 50 pounds of gold.
79
The Caspian Sea is also classed as the world's largest lake.
52
If Antarctica's ice sheets melted, the worlds oceans would rise by 60 to 65 metres (200 - 210ft) - everywhere
181
Check your map! The Pacific entrance of the Panama Canal is farther East than the Atlantic entrance.
40