I love this answer from the Reddit AMA with Neil deGrasse Tyson:
What is your favorite fact about the Universe?
That is will never end. That it’s on a one way trip of expansion. Something that many find to be philosophically unsettling. My view is that if your philosophy is not unsettled daily then you are blind to all the universe has to offer.
A few questions and answers from the excellent thread on Reddit:What is your favorite short science fact you like to tell people to really make them think?
That our bodies’ atoms are traceable to supernova stars that scattered their chemical enrichment across the cosmos, spawning the birth…