Not being a physicist (not even close), I find it amazing how within just ~100 years, "our" model of the universe has changed so drastically. I once read that

Not being a physicist (not even close), I find it amazing how within just ~100 years, "our" model of the universe has changed so drastically. I once read that sometime in the late 1800s, people assumed that they had basically understood how the universe works, and that all that was left was to fill in some of the blanks. And now look what an increasingly strange (and wonderful!) place we find ourselves in.