Originally posted by cripmeister
I think he knows enough about the subject to have an opinion on it. He has become popular because he, like Carl Sagan before him, can explain
difficult things in a way that ordinary people can understand. I suspect you like Kaku because he is more willing to speculate whereas Degrasse Tyson
is more of a hard science guy. Which is odd considering you call yourself a research scientist 
edit on 22/6/2012 by cripmeister because:
grammar and other stuff
Well, to start with, "eye witness testimony" is the basis of science. If you didn't have a scientist recording his observations, then you would
have no science. Perhaps some science is now based on automated recording of experimental data direct from instrument readings to some media by
computer, but that has certainly not always been the case.
So I think he is being a bit disingenuous when he puts down "eye witness testimony". What he is really saying is that he just isn't willing to
trust what others observe as much as he trusts in what a scientist observes in a laboratory setting.
He starts off his segment on UFOs playing a little word game. Okay, a UFO does mean "unidentified", however, the reality of the experience and the
actual source of the observed anomaly is unaffected by what you choose to call it, "UFO", "spaceship", whatever. And what it is to "the skeptical
scientist awaiting proof" is not the same as what the person actually observed. It is theoretically possible that a person might see an "alien
spacecraft", even if he does not have access to the physical evidence that will prove the reality of his sighting to the scientist.
As someone else mentioned, if there are real spaceships from ET civilizations visiting earth, and they don't want us to have proof of their existence
or presence, it is quite possible that they may be able to thwart all our legitimate scientific attempts to obtain physical evidence of their
presence, because they are probably much more technologically advanced than us, and possibly smarter than us also (or they have smarter computers).
Of course, most scientists who call themselves "UFO skeptics" are against the idea that it might even be worthwhile to search for evidence that ET
is visiting the planet, because they have already concluded this is not happening before they even do a scientific investigation.