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Natural History Museum on Twitter: "A #SharkWeek #MineralMonday. In folklore tongue stones were thought to be from serpents but are actually shark teeth http://t.co/cJwBjqpgcX" / Twitter
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Stock photo of Illustrationg of great white shark jaw with fossil shark teeth.... Available for sale on www.naturepl.com
If dinosaur bones turned to stone, how do we know they are indeed fossils, and not oddly shaped rocks? - Quora
The opal fossils that changed a miner's life and introduced a new species from Australia's deep past - ABC News
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9" Fossil Primitive Whale (Basilosaur) Jaw Section w/ Tooth - Morocco (#215146) For Sale - FossilEra.com
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