He is opposed to creationism and regularly engages in active debates with creationists.
During his time as director of the Australian Museum, he was the initiator of attempts to clone the Thylacinus cynocephalus, the Tasmanian tiger, an animal extinct since 1936.[5][6] Archer has stated that he is obsessed with bringing the thylacine back to life via cloning. He has said that his obsession is going to push the research further and further until he and his team will have their first living thylacine clone.[7]
In 2011, Archer published an article asserting that a vegetarian diet causes more suffering and deaths of animals than an omnivorous diet based on sustainable husbandry.[8]
Archer is married to the paleontologist Suzanne Hand, with whom he has two daughters.
Archer, M. and Clayton, C. (Eds.) (1984). Vertebrate Zoogeography & Evolution in Australasia: Animals in Space & Time. Hesperian Press. ISBN978-0-85905-036-4
Cronin, L. (Ed.) (1987). Koala: Australia's Endearing Marsupial. Reed Books Pty, Ltd. ISBN978-0-7301-0158-1 (text by Archer et al.)
Long, J.A., Archer, M., Flannery, T. and Hand, S. (2002). Prehistoric mammals of Australia and New Guinea: One hundred million years of evolution. University of NSW Press. ISBN978-0-86840-435-6
Archer, M., Hand, S. and Godthelp, H. (2000). Australia's lost world: Prehistoric animals of Riversleigh. Indiana University Press. ISBN978-0-253-33914-0