The most expensive cow in the world was sold in 2009 for $1.2 million.
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Dogs sometimes fake being sick to get attention.
26
Penguins have a gland above their eye that turns saltwater into freshwater.
12
A 42-foot sperm whale has about 7 tons of oil in it.
209
Some lizards, in which the tail is a major storage organ for accumulating reserves, will return to a dropped tail after the threat has passed, and will eat it to recover part of the sacrificed supplies.
13
Ants have tiny magnetic compasses in their antennae which help them navigate.
9