In The Time of Dinosaurs

"You know what we should do," Marco said grimly. "We should all acquire
that Tyrannosau-rus. We need one alive to acquire. It's alive. Until we
acquire a Big Rex we're just going to get chased around till sooner or
later we get eaten."

[...]

Marco was the first. He pressed his hand against the crocodilelike flesh.
And then Ax.
And lastly Cassie.