Did Modern Humans Leave Africa Once or Twice?

choi

Serena Tucci & Joshua M Akey, News & Views: Population Genetics: A Map of Human Wanderlust. Nature, _: _ (online publication Sept 21, 2016).
www.nature.com/nature/journal/vaop/ncurrent/full/nature19472.html

My comment:
(a) Read only the three paragraphs: paragraphs 4-6.
(b) This (introduction) and the three articles are all available for free (but there is no need to read the (3) articles, because it remains a work in progress). For this reason, there is no need to read NYT, either.

Carl Zimmer, 人类的非洲祖先如何走遍世界？DNA研究揭秘. 纽约时报, Sept 22, 2016
cn.nytstyle.com/science/20160922/ancient-dna-human-history/

, which is translated from

Carl Zimmer, How We Got Here: DNA Points to a Single Migration From Africa. New York Times, Sept 22, 2016.