People have used the constellations to navigate for thousands of years. Birds and seals have been shown to find their way by the stars, too. But who would've thought the humble dung beetle had celestial navigation figured out? Zoologists in South Africa observed dung beetles rolling their dung balls in straight lines on clear nights, but not on cloudy ones, and wondered why. For a study published in Current Biology, the researchers brought dung beetles to the Johannesburg planetarium.
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