50.3 MB (50.0 MB compressed)
4930 x 3569 pixels
41.7 x 30.2 cm ⏐ 16.4 x 11.9 in (300dpi)
JOHN SIBBICK / SCIENCE PHOTO LIBRARY JOHN SIBBICK / SCIENCE PHOTO LIBRARY
Heleosaurus. Computer illustration of the prehistoric mammal-like carnivorous reptile Heleosaurus on rocks. This basal synapsid lived during the middle of the Permian period (around 298 to 250 million years ago).
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