Including the non-governmental organisation of experts committed to expanding the frontiers of space, what were the other two societies Loeb was elected fellow of?
International Academy of Astronautics The International Academy of Astronautics (IAA) is a non-governmental organisation of experts committed to expanding the frontiers of space. It was established in Stockholm (Sweden) on August 16, 1960.
Silver Medal (Zoological Society of London) The Silver Medal of the Zoological Society of London is "Awarded to a Fellow of the Society or any other person for contributions to the understanding and appreciation of zoology, including such activities as public education in natural history, and wildlife conservation."