A rare mineral called coltan is found in the Democratic Republic of Congo (DRC) in Africa and is used in making mobile phones and other electronic goods.
Part of the country is the last stronghold of the eastern lowland gorilla.
The popularity of mobile phones across the world has led to the increasing mining of coltan, which is home to 80% of the world's coltan reserves.
Perhaps that mobile-phone stealing chimp on Monday was just getting its own back!
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