SHIT I HAVE RECENTLY LEARNED IN SCIENCE CLASSES THAT MADE ME FEEL SMALL

I'm insecure about how factual any of these statements are but I swear teachers said these things.
  1. Because of how tiny particles are, you use moles as a unit to refer to a sample of a given element. 1 mole= 602214078000000000000000 atoms/molecules/ions. 1 mole of Hydrogen, for example, weighs 1.008 grams.
  2. We are currently in an ice age that started 2.6 million years ago
  3. In 1 second a hurricane releases as much energy as an atomic bomb
  4. If the ozone layer was compressed, it would only be about 3mm thick