Owls have little to no sense of smell. Below: Great Horned Owl

Owls can turn their heads as much as 270 degrees. A blood-pooling system collects blood to power their brains and eyes when neck movement cuts off circulation.

They sunbath!

The tiniest owl in the world is the Elf Owl, which is 14 cm [6 in] tall. The largest North American owl, in appearance, is the Great Gray Owl, which is up to 81 cm [32 in] tall. Below: Great Gray owl sunbathing

When located at different heights on their head, their ears are able to pinpoint the location of sounds in multiple dimensions.

Their tube-shaped eyes are completely immobile, providing binocular vision which fully focuses on their prey and boosts depth perception. They're farsighted, meaning they can't see things close to their eyes clearly.

Owls hunt other owls. Great Horned Owls are the top predator of the smaller Barred Owl. Below: barn owl

Barn Owls swallow their prey whole-skin, bones, and all-and they eat up to 1,000 mice each year.

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Note: it is illegal in most countries to have a pet owl.