The Conversation

Revealed: why animals' pupils come in different shapes and sizes

Author: The Conversation

Spot the fox, wolf, sheep and...cuttlefish.Jim Champion (sheep); R'lyeh (wolf); Michele Lamberti (fox); William Warby (cuttlefish), CC BY-SA

Wolves and foxes are closely related and share many of the same characteristics. But look at their eyes – where wolves have rounded pupils like humans, foxes instead have a thin vertical line. But it...

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