Parrots Learn To Assign Value To Objects To Trade Them For Food

Parrots Learn To Assign Value To Objects To Trade Them For Food
Polly wants a cracker but she's sure not going to trade you two bolts for it, you gosh-darn swindler.

September 14, 2018 at 01:53AM
via Digg https://ift.tt/2p2JGS5