How high is the sky? Scientists have a pretty good handle on that one, what with their knowledge of the troposphere, stratosphere an the other "o-spheres." Now, thanks to new work, they are closing in ...

NARRATOR: You two are making food now? Ah she wants to have the spaghetti. Well, if you measure this cuboid up to find out her volume we can figure out just how much food she needs to be full up. So ...