Christmas Island has bridges for crabs to stop them getting run over during the mass migration.
9
When Washoe, the first chimp to use sign language, was told that her caretaker's baby had died, she signed "CRY."
20
The most expensive cow in the world was sold in 2009 for $1.2 million.
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Scientists have revived a flowering plant from a fruit stored away in permafrost by Arctic ground squirrel 32,000 years ago.
16
Sheep, goats, octopuses, and toads have rectangular pupils.
7