7 Things We Don’t Know About the Ocean The ocean covers 70% of the planet, but humans still don’t know very much about it. In this episode, Hank discusses seven mysterious ocean topics. Facebook Prev Article Next Article Discover Checkout these cool gadgets... Related Posts The Most Radioactive Places on Earth Is Technology Wiring Teens to Have Better Brains? Edible Water “Bottle” 5 Surprising Uses For Gold Its Official -Water On Mars! What Is Biodiversity ?