[photo via CoreBurn]Dear Mammatus Clouds,
You are named "mammatus" because you look like boobs. Okay, udders, technically, but still: boobs. But I think you look like the end of the world. By the transitive property, that would mean that boobs are the end of the world, which I can say with some authority is patently untrue. Please get a better name more suited to your end-of-the-world-ness, like Rapture Formations, or Massive Global Explosion Puffs, or Michael Bay Wins an Oscar Clouds.