There is a lot of dangerous, radioactive water inside Fukushima, as TEPCO struggles to keep the fuel rods from burning up. Water accumulates—TEPCO estimates there are 67,000 tons of irradiated water inside.

How much water is that? 67,000 tons is a tricky amount to visualize—but it's enough to fill 27 Olympic-sized swimming pools. Splish splash. Makes it a bit easier to wrap your head around just how difficult of a problem TEPCO faces in disposing of this stuff. Let's hope they think of something better than just dumping it into the ocean.