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Fossilized Teeth

All articles tagged with #fossilized teeth

science1 month ago•46 min saved

Egypt desert fossils reveal five ancient sharks from the dinosaur era

Archaeologists digging in Egypt’s southwestern desert uncovered a Late Cretaceous shark graveyard within phosphate beds of the Duwi Formation, preserving a former tropical marine ecosystem and 14 fossilized teeth. The find includes five extinct lamniform sharks—Cretalamna cf. C. maroccana, Scapanorhynchus cf. S. raphiodon, Serratolamna cf. S. serrata, Squalicorax bassanii, and Squalicorax pristodontus—offering new insight into Africa’s ancient paleobiodiversity and past sea levels that were significantly higher than today.

via Yahoo|

#cretaceous-period #egypt #extinct-shark-species

science1 year ago•3 min saved

Scientists Recover 24-Million-Year-Old Proteins from Extinct Rhino Tooth

Scientists have extracted the oldest animal proteins from 18 to 24 million-year-old fossils, using dental enamel to preserve these molecules in harsh environments, significantly extending the known age range for recoverable ancient proteins and opening new avenues for studying deep evolutionary history.

via IFLScience|

#ancient-proteins #evolutionary-biology #fossilized-teeth

science3 years ago•6 min saved

Insights into Brain Development from Fossil Teeth and Early Childhood Studies.

A mathematical model using the relative lengths of molar teeth has been developed by paleoanthropologists to track evolutionary changes in prenatal growth rates in the fossil record. The model suggests that pregnancy and prenatal growth became more humanlike than chimplike almost 1 million years ago. The rate of prenatal growth directly relates to how big an adult brain grows, and understanding more about when prenatal growth and pregnancy became humanlike reveals information about when and how our brains did too. Teeth can even indirectly hint at the emergence of human consciousness via evolving brain size.

via SAPIENS|

#brain-development #fossilized-teeth #human-evolution