ahlam1399
07-14-2017, 02:23 PM
As recently as 10 years ago, humans were thought to be the only species with the ability to plan. Turns out ravens can too, on a par with great apes.
أكثر... (http://www.npr.org/sections/thetwo-way/2017/07/13/537040868/ravens-surprise-scientists-by-showing-they-can-plan?utm_medium=RSS&utm_campaign=news)
أكثر... (http://www.npr.org/sections/thetwo-way/2017/07/13/537040868/ravens-surprise-scientists-by-showing-they-can-plan?utm_medium=RSS&utm_campaign=news)