- In 1783 an Icelandic eruption threw up enough dust to temporarily block out the sun over Europe.
- About 20 to 30 volcanoes erupt each year, mostly under the sea.
- A huge underground river runs underneath the Nile, with six times more water than the river above.
- Lake Bosumtwi in Ghana formed in a hollow made by a meteorite.
- Beaver Lake, in Yellowstone Park , USA, was artificially created by beaver damming.
Read more after the break...
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