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On the cover:
The Opossum. Opossums, as a group, are among the oldest, most primitive mammals of the
New World. Some scientists call them "living fossils" because they have survived relatively
unchanged for at least 50 million years. The brain case of the opossum is rather small in
comparison to other mammals of a similar size and it is often reputed to be a rather dimwitted animal. While lacking in so-called "intelligence", the opossum is nevertheless an
interesting and very successful animal. In response to a threat, an opossum is more likely to
resort to a different tactic than biting: they pretend to be dead. This is actually quite comical
to see: the animal will open its mouth and loll out its tongue, looking for all the world like
it is actually dead. Since many predators will only eat live prey, this tactic of "playing
possum" must be moderately successful.
See: http://www.opossum.org/
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