68 million year old Dinosaur Bone (approx 15-30mm). 100 million year old Dinosaur Tooth (approx 20-40mm). 70 million year old Dinosaur Egg Shell (approx 5-15mm). The cause of the mass extinction that wiped these creatures out, & marks the end of the Cretaceous and the beginning of the Paleogene period, remains a scientific mystery!
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