The rubber ducky comet’s head has spent 4.5 billion years trying to twist away from its neck. And that’s caused some stress fractures.

Comet 67P/Churyumov-Gerasimenko, which the European Space Agency explored for two years using its Rosetta probe, takes its name from its dual-lobe shape — which gives it a duck-like head, neck and body. Now, thanks to a new three-dimensional analysis of images from the Rosetta mission, researchers believe the comet is full of fissures,

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