By the Book 9

So we’ve got a bunch of these neutrinos floating around in space…ya know free floating, just like the CMB, except not light. And we can calculate their temperature and stuff so we should see a background of them … if, that is, we could see neutrinos. But they don’t have any charge and barely have any mass so they are really really hard to see, but…we’re working on that. And eventually I think we will be able to see them better. When that happens something else that’s very cool will happen. Remember how I said we couldn’t see any further back in time because there wasn’t any light to look at before the end of the plasma period. But if we were able to see the neutrinos then we would have a small, strange window into the first second of the universe. This is monumental. We would be looking much further than we ever have before! And who knows what we would find!