3 ms·
There is a PNAS paper which asks this question. http://m.pnas.org/content/108/8/3157.abstract?sid=cf741177-dcf0-489c-8df8-ac38b393ca1c http://m.pnas.org/content
by fatso784 9y ago
There is a PNAS paper which asks this question. http://m.pnas.org/content/108/8/3157.abstract?sid=cf741177-dcf0-489c-8df8-ac38b393ca1c http://m.pnas.org/content/108/8/3157.abstract?sid=cf741177-d...