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 4 years 1 month 2 weeks ago • 705 views • 1:31interesting miscellany
Created: 1 decade 7 years 5 months 2 weeks ago
Updated: 1 decade 4 years ago
Views: 11,656
Updated: 1 decade 4 years ago
Views: 11,656