How to Tell a Rock from a Penguin: It’s Harder Than It Sounds

By: Lishka Arata

Many things distinguish penguins from rocks. There’s color difference (usually), behavior (penguins waddle, rocks don’t), social structure (rocks don’t have one) — the list goes on. But why might someone need to distinguish between rocks and penguins?

It’s a skill central to a long-term project that relies on citizen scientists, working from the comfort of their homes, to identify penguins in photographs taken by remotely operated cameras in Antarctica. The project, f

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