For a very long time I have been puzzled by scale. One the one hand the universe seems immensely vast. On the other hand at the atomic scale things are immensely small. We experience things at our scale.
What I wonder is this: does something link these two? Is the universe actually within us? Our brains cannot begin to comprehend, but our thinking about both the macro and micro scales has radically changed in 200 years.
In another 200 years people may look back at us in amazement.