What Will Rick Sanchez, CNN's Mr. Wizard, Discover Next About Science?

Last Thursday, CNN anchor Rick Sanchez, the network's Mr. Wizard, suggested Iceland shouldn't have a volcano: "You think it's too cold to have a volcano there." On Friday, Sanchez followed up with these:

"Here's what I don't get about DVDs -- how are you supposed to rewind them?"

"....Why is it you can sometimes see the moon in the sky during the day, but you never see the sun at night?"