For reference, the source paper: http://www.pnas.org/content/early/2014/02/13/1400547111.abstract http://www.pnas.org/content/early/2014/02/13/1400547111.abst..

For reference, the source paper: http://www.pnas.org/content/early/2014/02/13/1400547111.abstract http://www.pnas.org/content/early/2014/02/13/1400547111.abst... It's not a completely novel idea, but it it an interesting find which may lead to more interesting conclusions.