A team of scientists led by geochemist Dingsu Feng has uncovered a new way to study ancient air using dinosaur teeth from the Cretaceous and Jurassic periods. By analyzing oxygen isotope levels in fossil tooth enamel, they can infer atmospheric carbon dioxide levels and reconstruct the very air dinosaurs breathed. The results suggest that CO2 levels fluctuated significantly during this time period, with spikes linked to volcanic eruptions. This research provides new insights into the composition of the Mesozoic atmosphere and sheds light on how life on Earth was impacted by global events.
Source: https://www.sciencealert.com/prehistoric-air-has-been-reconstructed-from-dinosaur-teeth-in-an-amazing-first