Although I'm quite bright i was a complete drop-out at school.
Therefore facts and knowledge that some people know easily completely amaze me!
Last year I had to really research 'how humans hear' and sound being carried on vibrations was a revelation!
Recently I added 'there is nothing to vibrate off in the solar system, therefore space is completely silent 😲😲😲' to my repertoire.
What have you learned as an adult that has blown your mind (or is it just me?!!).