Challenge has finished
Rocks are everywhere in nature. You see them all the time, but you don't always stop to appreciate them.
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Tuesday, 16th November, 2010 (GMT)
Tuesday, 23rd November, 2010 – Monday, 29th November, 2010 (GMT)
Tuesday, 30th November, 2010 – Monday, 6th December, 2010 (GMT)
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