4 ms·
See the paper here http://www.sciencemag.org/content/347/6218/145 http://www.sciencemag.org/content/347/6218/145
by michaelmachine 12y ago
See the paper here http://www.sciencemag.org/content/347/6218/145 http://www.sciencemag.org/content/347/6218/145