3 ms·
PBS Nova video about him too: http://www.pbs.org/wgbh/nova/tech/profile-von-ahn.html http://www.pbs.org/wgbh/nova/tech/profile-von-ahn.html
by seiji 16y ago
PBS Nova video about him too: http://www.pbs.org/wgbh/nova/tech/profile-von-ahn.html http://www.pbs.org/wgbh/nova/tech/profile-von-ahn.html