4 ms·

Feynman's explanation of where a tree gets its mass starts here: http://www.youtube.com/watch?v=N1pIYI5JQLE#t=2m12s http://www.youtube.com/watch?v=N1pIYI5JQLE#t

by BobbyH 16y ago

Feynman's explanation of where a tree gets its mass starts here: http://www.youtube.com/watch?v=N1pIYI5JQLE#t=2m12s http://www.youtube.com/watch?v=N1pIYI5JQLE#t=2m12s