The diversity of human laughter is a distant heir of an animal vocalization that originally assured "This is not meant seriously!" https://books.google.de/books?hl=de&lr=&id=4YbiDwAAQBAJ&oi=fnd&pg=PT111&dq=%22Evolution,+Structure,+and+Functions+of+Human+Laughter%22&ots=ug6LTitKIf&sig=0Qf1MgcQu2FbkMtLF87krrbjiH8#v=onepage&q=Evolution%2C%20Structure%2C%20and%20Functions%20of%20Human%20Laughter&f=false …pic.twitter.com/Kref8kGt2X
3:11 AM - 20 May 2020
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