The tour guide just casually dropping that he's been working at the museum for 6 years with the precision of a geologic timescale! Paleontologists spend decades meticulously dating fossils using radiometric techniques and complex stratigraphic analysis, and this guy's like "eh, just add my employment duration to the Cretaceous period." The beautiful part is that technically he's not wrong - the T. rex is 70,000,006 years old now. His dedication to factual accuracy would make any scientist proud, even if his methodology is... questionable at best.