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When two spelunkers investigated what they thought was trash in a cave in Mexico, they discovered more than a dozen artifacts ...
When a cave explorer stumbled across what she thought was trash, she couldn't believe it when she realised what she'd ...
The iconic chasing-arrows recycling symbol, invented 20 years earlier, was everywhere in the early 1990s. Its tight spiral of folded arrows seemed to promise that discarded glass bottles and ...
The iconic chasing-arrows recycling symbol, invented 20 years earlier, was everywhere in the early 1990s. Its tight spiral of folded arrows seemed to promise that discarded glass bottles and ...