Waterworld and Other Worst Case Scenarios

I learned some interesting things in the aftermath of the Rule of Cool post. In particular, did you know the underwater future of Waterworld can never happen? Shocking, considering one of the main messages of that (stupidly expensive) film was: "If we don't take better care of our planet, this is what will happen."



In order for the world to be entirely, or even mostly, covered with water, sea levels would have to rise over 8 kilometers.* But if all of the ice in the entire world melted, sea ...