From the NY Times: "Aristotle declared that humans are the only animal to laugh, but then, he never saw this video of Jaak Panksepp tickling rats. ... It seems to be a happy sound: rats will run mazes... continue reading
posted by maudlin 1 decade 7 years 1 month 3 weeks ago • 12,456 views • 1:31The Best of the Nature Channel
Created: 1 decade 6 years 5 months 4 weeks ago
Updated: 1 decade 4 years 9 months ago
Views: 9,910
Updated: 1 decade 4 years 9 months ago
Views: 9,910
Enjoy this collection of the very best Nature videos on VideoSift!