Over 1 million penguins descend on Argentina

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Baby hippo Fiona goes for a swim

'Annoyed' octopus puffs up for diver

Otter doesn't need a sled to slide in the snow

Ziggy the dog is sooo ready for his walk

Leopard mom reunited with missing babies

Fireball lights up parts of the Midwest

This bot can fly like a bat — and that's no easy feat

The Amazon river has a coral reef, and this video proves it