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when did the t rex first appear
when did t rex first appear on earth
where was the first t rex found
what period was the t rex from
what era was the t rex in
how long did t rex exist
first t rex discovery
who found the first t-rex
t rex period of history
where was the first t-rex discovered
when did the t rex first appear, when did t rex first appear on earth, where was the first t rex found, what period was the t rex from, what era was the t rex in, how long did t rex exist, first t rex discovery, who found the first t-rex, t rex period of history, where was the first t-rex discovered
