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The current Alton Browncast with William Shatner is a beautiful thing. Go listen.

Also, I learned from Star Talk Radio, with Neil deGrasse Tyson, that Dr. Tyson has always wanted a floating rubber Saturn for his bathtub, since he knew as a child that the density of Saturn is less than water (and therefore, Saturn would float in water.) Why is there no such thing? And if there is such a thing, why is it not sold at The Hayden Planetarium?

Get on it, people.