2 ms·
This excellent piece by Sagan, Feynman, et al. also addresses these questions: http://www.youtube.com/watch?v=XGK84Poeynk http://www.youtube.com/watch?v=XGK84Po
by jey 17y ago
This excellent piece by Sagan, Feynman, et al. also addresses these questions: http://www.youtube.com/watch?v=XGK84Poeynk http://www.youtube.com/watch?v=XGK84Poeynk