9 July 2009
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Q.What is a prototherian?
A.Prototherians are a subclass of mammals. Modern prototherians are the platypus and echidna (aka spiny anteater). They are only found in Australasia.
Q.What is the smallest mammal in the world
A.The hog-nosed bat (AKA the bumblebee bat) is the smallest mammal in the world & is just 3.1 cm long & weighs just 2 grams. It has a wingspan of 160mm.
Q.Do fish sleep?
A.Fish don't sleep like mammals but rest & save energy in a still, daydream-like state. With no eyelids, they don't shut their eyes & stay alert to danger.