If everyone on Earth sat in the ocean at once, how much would sea level rise?

If everyone on Earth sat in the ocean at once, how much would sea level rise?

Hypothetical questions, like what would happen if everyone on Earth went for an ocean swim at once, are fun to think about. And using math, you can get pretty close to a real answer. Let’s start by considering a smaller version of the same question.If you fill a bathtub all the way to the top [...]