 Now, remember, here are two societies that are only a few hundred miles apart where the scientists knew each other, went to the same universities, attended the same conferences, published papers in the same journals, and they couldn't figure out what the other guy was going to use. And here we Earthlings sit, and we know the techniques that aliens umpteen light years away—we don't know how many, we don't know where, we don't know how old or for why—