What are the strangest known nuclei? Specifically, have any nuclei with strangeness over 3 been seen? Are there any known charming or beautiful hypernuclei? Considering that Be-8, with half-life 10-16 s is a well described nucleus, the 10-12...10-13 s lifetime of charming and beautiful hyperons should be plenty to form nuclei. Also, have any nuclei been seen which contain no nucleons? And what are the observed properties of neutral and negative hypernuclei?