Mystery noises from space

Sooooouuuuuds froooooooooom spaaaaaaaaaace!

It sounds like a joke, or at least like a B movie. But apparently noises are being heard from space, and no one knows what they are or where they come from.

Scientists are analyzing and have theories, but they "really don't know what it is." I say it's clusters of hard-shelled gas bubbles bumping into each other. Why not?

I've said it once, and I'll say it again -- "I'm a scientist, too..."