The human imagination is pretty limited when it comes to animal senses. We call people with good vision “eagle eye,” and believe that toucan’s can smell cereal because they have big noses. It turns out the animal kingdom has plenty of creatures whose senses go beyond what we can conceive without our head exploding.

Silvertip Grizzlies Can Smell You From 18 Miles Away (And Across Time)

Silvertip grizzlies can smell your fear, just like any other predator. But unlike most predators, they can smell your fear over distances measured in double digits. In miles. These bears can smell a carcass from 18 miles away. When a silvertip enters a clearing, you’re screwed even if you left 48 hours before. And if you’re still there, all that sweating will be laying down a neon-colored trail for the bear to follow until you get tired.

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