The Bay of Fundy in Canada is famous as the place with the highest tides on earth. The way water moves around against various earth features is crazy. Rivers actually change direction twice four times a day! This powerful water movement would seem to be ripe for generating electricity. So why don't they do that? Tom Scott went there and almost froze to explain it to us. We also get to see his bathroom. The title of this video indicates that "there's just one problem," yet the real answer is that there are many problems. But people are still working on the idea, and one of these days, we will overcome them.