No matter how smart you are, there is always something new to learn. Sometimes, it’s something trivial – like snails have teeth (I didn’t know that until today) – and sometimes, it’s something that could save your life, or simply keep you from eating something really gross.
Take my oldest son’s BFF, he knows a LOT of facts about a LOT of crazy things. For instance, he knows why beer makes a person fat – like the biochemical details, not just that it does. He knows that rats multiply so quickly that within eighteen months, two rats can turn into over a million furry little buggers. He also knows (for a fact) that Superman would kick the crap out of Batman should the two of them ever meet and decide to fight. I think every young adult male has a theory (or twenty) like this.