National Geographic News, Reporting Your World Daily

Sunday, November 22, 2009

Photo: Embryos Dating Back 500 Million Years Revealed With X-Rays


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Scientists used the world's largest microscope to take this image of an ancient wormlike creature called a penis worm. The high level of detail in this and other images will give researchers important clues that will help determine how closely the animals are related to modern species.

Image courtesy Philip Donoghue/Nature