A cat rubs against people not only to be affectionate but also to mark out its territory with scent glands around its face. The tail area and paws also carry the cat's scent.
293
Sharks have been on the planet longer than trees.
14
Bats sleep 18-20 hours per day.
5
The most expensive cow in the world was sold in 2009 for $1.2 million.
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