When did “the wave” become a staple of stadium crowds? ELT talks to the professional cheerleader who first got fans out of their seats. Plus, the egg-laying mammal that is not a marsupial. We give monotremes their due.

Guests: professional cheerleader “Krazy” George Henderson; weird-Australian-mammal expert Robin Beck.

Thanks also to callers Leslie, Natalie, and Manuel.

Got a burning question that needs answering? Call now: 833-RING-ELT.

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