Nature & Environment
Studying mammals: The insect hunters
...family as a whole displays features that, to some degree, resemble those of ancestral mammals. For example, their body temperature is low and varies throughout a 24-hour period. There is also a cloaca - the common opening for the digestive and urinogenital systems - that is also present in non-mammals such as lizards. Hedgehogs eat earthworms, slugs, eggs and frogs, in...