(OCEANS) In an old episode of Friends, “The One with the Jellyfish,” Monica gets stung and the only cure is, well, unpleasant. We’re told in school that jellyfish are brainless floaters. Made up of 95% water and oozing with stinging venom, they’re kind of like swimming poison ivy. What we’re not told is how ancient jellies really are, how varied the species, and how complex scientists are finding their infrastructure to be. Venture to the National Aquarium with The New York Times’ Natalie Angier to better understand the fascinating floating invertebrates, our age-old friend, the jellyfish. Read on…— Global Animal