Earlier this week, we received a picture of what looks to be a millipede – a long, black millipede, more precisely. Or at least it appears to be long because its body is about ten times as long as it is wide. The reader merely asked what kind of “worm” it is, so the short answer to this question is simply that it is not a worm at all, but rather a millipede. Why do we think this long, black creature is a millipede instead of, say, a centipede (and what are the differences between millipedes and centipedes anyway)? How can we tell it is millipede and not some type of worm? Are there worms with legs at all?