A new permanent exhibit at Harvard Museum of Natural History, Sea Creatures in Glass:  Blaschka Models of Marine Invertebrates features recently restored hand-crafted glass models created by famed glass artists Leopold and Rudolf Blaschka.  From delicate jellyfish and anemones to tentacled squid and bizarre sea slugs, these spectacular models were purchased by Harvard's Museum of Comparative Zoology during the latter half of the nineteenth century, and many have not been on display for decades.