Geologic Time Scale


Time Period Duration (Millions of Years)


Cenozoic 66-0


Mesozoic 252-66


Paleozoic 541-252


The last members of the species Tyrranosaurus rex lived approximately 68-66 million years ago. During which era did the last Tyrannosaurus live?


a

Cenozoic

b

Mesozoic

c

Paleozoic

d

None of these