A group of unicorns is called a blessing.
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The elephant brain weighs about 6,000g.
274
In Australia, there are spiders big enough to eat snakes.
20
Early American humans hunted car-size armadillos and used their shells for houses.
12
Cats are one of the only animals to domesticate themselves and approach humans on their own terms.
20
A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
23