While attempts at going to outer space and exploring the cosmos, or diving deep into our vast oceans and trying to figure out where the heck is Nemo are all fine and dandy, but there’s more to learn about the world we live in than just physical exploration.
Take learning about cultures, religion, and just all things societies, for instance. Humans are complicated beings in general, but the social and societal structures we’ve built is the same vast vat of everything as is the ocean deep and space infinite.