Los AngelesT. rex teeth read 36.3°C, like an elephant.

Size alone can keep giants warm, so the result does not settle metabolism.

Heavy-isotope bonding in enamel records temperature, and crocodilians from the same rivers read 30.9°C.

The California team next plans to test other dinosaurs with the same method.

How each outlet framed it
Ars Technica
presents dental isotope analysis as innovation to measure body temperature (36°C), settling endotherm debate with empirical data

Sources: Ars Technica