FYI, the associated paper from PNAS is http://www.pnas.org/content/early/2017/11/21/1713450114.full.pdf http://www.pnas.org/content/early/2017/11/21/1713450114.

FYI, the associated paper from PNAS is http://www.pnas.org/content/early/2017/11/21/1713450114.full.pdf http://www.pnas.org/content/early/2017/11/21/1713450114.full...