There are still so many things we don’t know about the ocean. A lot of things down there still remain a mystery. Just look at how many strange creatures and phenomena under the ocean.
The ocean is so mysterious yet it often left out in the conversation.
Another frontier that we still haven’t explored properly yet is the brain. We still don’t know how our brain works in certain ways. Psychology only started in the 19th century, and until recently it was considered a woo-woo study into the crazy. We still don’t know much about common things like why we dream and the cause of depression.
Should we exhaust places to explore, the brain could very much be the final frontier.