Are These Particles Really All Around You?

This week's topic is all about the tiniest things in the universe. Despite trillions of them coursing through our bodies right now, we all remain oblivious. So how do we know that that is happening? Because we can see them, of course, with a gaget called a cloud chamber. This is a bath of extremely cold alcohol fumes in which particles arrive from space and elsewhere around us stream through. And what happens is those nuclei are unstable, and they kick out a fragment of themselves or turn into something else. Those are electrons or positrons. They are all around you. You are radioactive as well. But thank goodness, your skin is actually prettly good protection against