PHILIPPE PLAILLY / SCIENCE PHOTO LIBRARY PHILIPPE PLAILLY / SCIENCE PHOTO LIBRARY
Prehistoric jigsaw puzzle - a paleontologist piecing together fragments of shell from a fossilised dinosaur egg. The egg is about 20 centimetres high, and the shell is about 2 millimetres thick. As yet, no fossilised remains of embryos have been found in dinosaur eggs. Photographed at Esperaza, southern France.
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