Some of the most spectacular beasts in East Coast museums happen to be Tyrannosaurus rexes from Montana.

"Now, Dr. Richgels, you picked a folder from the story box. Could you show us the one that you picked?" Mine shows two Tyrannosaurus rexes fighting […]

So Lyell's view is not inconsistent with Dollo's Law of Irreversibility in that, under awful (i.e., evolutionary) changes, biological organisms would not follow the same unlikely path regenerating, say, DNA-exact Tyrannosaurus rexes from ancestral chicken stock in some future age.

Tyrannosaurus rex

Meaning

Noun

Synonyms