1
By XKCD
This small infographic shows the thickness of see ice up against famous city skylines. Notice how much bigger the ice sheets are than the cities!
Grade Level   4 5 6 7 8 9 10 11 12
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2
A cool gallery of photos that essentially blend pictures just after the earthquake in San Francisco with photos of the same locations today.
Grade Level   K 1 2 3 4 5 6 7 8 9 10 11 12
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