ahlam1399
08-17-2016, 07:32 PM
Groups of walruses are vulnerable to disturbances, but it's hard to avoid them if you don't k**w where they are. A new tool from U.S. and Russian researchers draws on history to protect the animals.
أكثر... (http://www.npr.org/sections/thetwo-way/2016/08/17/490225647/what-does-it-take-to-map-a-walrus-hangout-160-years-and-a-lot-of-help?utm_medium=RSS&utm_campaign=news)
أكثر... (http://www.npr.org/sections/thetwo-way/2016/08/17/490225647/what-does-it-take-to-map-a-walrus-hangout-160-years-and-a-lot-of-help?utm_medium=RSS&utm_campaign=news)