The Sahara desert expands at about 1km per month.
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It takes a drop of ocean water more than 1,000 years to circulate around the world.
61
The warmest temperature ever recorded on Antarctica was 3 degrees F.
175
The Caspian Sea is also classed as the world's largest lake.
52
The Atlantic Ocean is saltier than the Pacific Ocean.
54
The Niagara Falls moves upstream at an average rate of about 295ft a century!
48
Check your map! Virginia extends farther west than West Virginia.
67