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25 accidental inventions that changed the world

Discover 25 accidental inventions that changed the world! From penicillin to Post-it Notes, explore how serendipity sparked ...
Discover Wildlife on MSN

China's giant sinkholes are a refuge for a rare tree – but they're also cutting off its escape route

These enormous depressions offer an endangered species of magnolia tree shelter from heat and drought, while also posing ...