first of all, they're at latites where thers four-degree weather in the wintertime. so let me ask you a question. oh, you don't know about four degrees yet. four degrees. i got to tell you something about four-degree water. four-degree water is like dense or not dense? dense? - dense or dense dense? - dense dense. honey, four-degree water is the densest water you can get 'cause water has different densities at difrent temperatures. see, if you heat some water up, wouldn't the volume get more and more and more? you know that's true because if you put a pan of water on a stove and fill it im-filled and then turn on the stove, what's the water gonna do, gang? beginning with o, f. - overflow. - overflow. the water is going to expand, see, okay? so the wer, when it expands, it'll have more volume for the same weight, it will be what? less dense. so density depends on temperature. but it turns out ice got less denty than boiling water. now, how come? because it forms all those open structures. i'm going to make a graph here and this graph is volume, volume of water versus