Carl Sagan explains the atomic structure. Also explained are the basics of fission and criticality in a nuclear reactor.
Fisson basics [2]
By iraszl [1] on Fri, 08/30/2013

By iraszl [1] on Fri, 08/30/2013
Links:
[1] https://thoriumforum.com/users/iraszl
[2] https://thoriumforum.com/fisson-basics
[3] https://thoriumforum.com/sites/default/files/carl-sagan.jpg