Board Thread:Movie discussion/@comment-24175751-20141026143828/@comment-68.225.34.157-20160824134920

I'm inclined to agree withthe theory about InGen speeding up the aging process on the young T-rex, seeing as how Dr. Wu admits that in the book (which some people seem to forget the movies are based on). He also states in the original novel (pg 106) that dinosaurs mature rapidly, attaining full size within 2-4 years. Based on this information, it's incredibly likely that the Rex in JP3 was, in fact, the infant tyrannosaur in The Lost World.