clouds

There’s a joke that asks, “Where do astronauts go for a drink?” The answer is, “The space bar!” But in the distant future, you might ask that question literally. There really is alcohol in space, even if we can’t access it yet.

Some days rain falls in a light, calm sweep across the earth. On other days rain falls in a torrential downpour, flooding the ground below. So, what causes this difference?

Have you ever seen a perfectly cloudless sky? Cloudless--that is--except for two or three long white lines smeared across the perfect blue sky by airplanes like smudges on a pane of glass.