DiscoverHowStuffWorks NOWStealing Sand, Communicating via Poop, and Clinical Trial Participation
Stealing Sand, Communicating via Poop, and Clinical Trial Participation

Stealing Sand, Communicating via Poop, and Clinical Trial Participation

Update: 2017-03-13
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and is in such high demand that tons of it are being stolen from beaches. White rhinos use middens as a complex communal message board. Plus, clinical trials need more volunteers -- we explain why.

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Stealing Sand, Communicating via Poop, and Clinical Trial Participation

Stealing Sand, Communicating via Poop, and Clinical Trial Participation

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