re: Kaku is a charlatan
I actually agree about your view on Kaku and his anti-nuke attitude towards Cassini. Funny how the anti-nuke lobby doesn't seem to realize that we are bombarded by radiation from the Sun and space every second of every day. They should also be thrilled when a nuke is sent hundreds of millions of kilometers away from Earth.
That being said, I only chose to quote Kaku because he did give a
good synopsis of the Kardashev Types scale, plus the other Web site I gave the URL has plenty of other choices for information on the subject.
Imagine how paltry a little nuclear radiation would be to a civilization that can enclose its whole sun or use the resources of an entire galaxy!