CONTEXT: Did you know there’s an invisible line penguins never cross? 🐧 Even though penguins live across the southern half of the planet — from Antarctica to the coasts of South America, Africa, Australia, and New Zealand — you’ll never find them in the northern hemisphere, not even in the Arctic. That’s because the equator acts as a natural ecological boundary. For penguins, crossing the equator’s warm tropical waters is deadly — the temperature is too high, and there’s no cold-water fish for