[AndrewC]

There is strong evidence they were warm blooded or sem-warm blooded. Reptiles are cold blooded.

Dinos did not have turbinates, and therefore, were cold blooded.

Does this prove that dinos were warm-blooded? Unfortunately, no. It does suggest that they were more advanced than modern lizards in that they could keep the temperature constant throughout their entire body

Both sides, take your pick.

[Junior]

Turbinates do not necessarily speak of warm-bloodedness; cross-sections of dino bones compare favorably in blood-vessel density to warm-blooded animals. This is a far more valid test of warm-bloodedness.

[VadeRetro]

This web page is wrong, then. It should say, "If you're a mouth-breather, you're not viable."