Scientist discover the Octopus version of Cairo in Australia: Marine biologists discovered an underwater octopus “city” off the coast of Australia that has upended conventional wisdom that “gloomy” octopuses are antisocial, according to Smithsonian Magazine. Scientists had previously thought this species of octopus avoided social interactions beyond mating, but a group of researchers observing the species in “Octlantis” found that the underwater creatures exhibited complex social interactions, including fighting over their dens. “These new finds give insights into the lives of the mysterious octopus — a creature that is notoriously difficult to study” (watch, runtime: 2:04).