YT: Scientists listened to animals playing and they noticed something that appeared to them to be laughter. They studied this behavior for couple of years before actually realizing that it is laughter.
posted by peggedbea 1 decade 3 years 11 months 2 weeks ago • 705 views • 1:31interesting miscellany
Created: 1 decade 7 years 3 months ago
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Updated: 1 decade 3 years 9 months 3 weeks ago
Views: 11,656