10. This Hurts My Brain
Following the trend of my mind trying to comprehend how tiny I am and how massive the universe is, we now have exhibit A telling us just how much is distantly out there. A single grain. One single grain of sand held up blocks out the thousands of galaxies.

I suppose that rides on the coattails of the previous fact in knowing that sand is outnumbered by stars, but man. The vast amount of mysteries hiding out there continues to pile up by the moment. It really builds curiosity.