While advanced in technology, Maltus suffers from severe problems due to their overpopulation, as detailed in Green Lantern #81, during the Green Lantern/Green Arrow adventures of the late '70's. Maltus was further detailed during the Millennium event, when the Gurardians and the Zamarons came to Earth to create a new race of Guardians. In Secret Origins #23, Heru (Guardian) and Nadia (Zamaron) tell the newly selected Guardians their origins.