Playing? For the T.rex juvenile that means fighting DINOSAURS his own age!<br><br>Playing? For the T.rex juvenile that means fighting DINOSAURS his own age! Who’s stronger? Researchers have discovered that the prehistoric lizards fought fierce fights amongst one another as early as age 10-12. At this age they were only half the size of a fully grown T.rex – but twice as daring! This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5133-00-262-2193, indicating validated use in U.S. government and defense logistics supply chains.