That darting, slithering, forked tongue

No, I’m not talking about Bill Clinton. I’m talking about the one that many kinds of our modern reptiles have, including snakes, komodo dragons, etc.

Why don’t you ever see dinosaurs depicted with it? Did none of them have it? Is there no fossil record of it?

If they didn’t have it, when did some of the reptiles develop it?

Of all living reptiles, crocodilians are probably the most closely related to the dinosaurs. Birds may be more closely related yet (a very controversial proposition the last I heard). Crocodilians (and birds) don’t exactly have darting tongues. Neither do turtles.

It was luck enough that a dinosaur heart was found fossilized. Other soft tissues that aren’t nearly as protected as a heart will probably not be found.