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brontosaurus dinosaur fossil london natural history museum skeleton

Brontosaurus (also not a real dinosaur).

American Museum of Natural History preparators working on a mount of a Brontosaurus (Apatosaurus) skeleton, 1904.

Stegosaurus skeleton by midwinter, via Flickr

Fossil trilobite from the Devonian period, Dicranurus monstrosus, found in the Moroccan Sahara. Museum of Ancient Life, Utah.