Install Free Date Time Clock Widget and Tool!
Just press copy button and paste into your blog or website.
(Please switch to 'HTML' mode when posting into your blog. Examples: WordPress Example, Blogger Example)
Wikipedia, the free encyclopedia The cooperative pulling paradigm is an experimental design in which animals cooperate to pull food towards themselves Researchers use these experiments to try to understand how cooperation works and how and when it may have evolved Meredith Crawford ran the first such experiment in 1937, attaching two ropes to a rolling platform that was too heavy to be pulled by a single chimpanzee