Steven Johnson talks about Joseph Priestley, the man who first realized that plants actually create the oxygen we breathe.
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7.1 1984 HD
6.4 1996 HD
7 1996 HD
6 2009 HD
8.5 2014 HD
7.1 1990 HD
10 1990 HD
0 2014 HD
7.5 2008 HD
5.712 2015 HD
6.3 2015 HD
6.3 2024 HD
7.429 1989 HD
8.022 2009 HD
5.866 2016 HD
8 2002 HD
7.5 2014 HD
5 2015 HD
7 2014 HD
0 1988 HD
