Sorry, Spider-Man, but recent research shows that everyone's a little bit spiderish. When scientists at Aarhus University and the Beijing Genomics Institute mapped the spider genome, they found that -- at least on a genetic level -- humans share surprising resemblances with spiders.
If your spider-sense is tingling, don't worry: Comparing genomes almost always reveals just how much genetic information is conserved across species. You share most of your genetic material with chimps, about three-quarters with chickens and even a bit with grapes. (But you should still stay away from radioactive spiders.)