Dave Hone: T-Rex, Dinosaurs, Extinction, Evolution, and Jurassic Park | Lex Fridman Podcast #480
Paleontologist Dave Hone tells Lex Fridman that T-Rex was so dominant it had no real predator competition — the next-largest carnivore in its ecosystem was roughly weasel-sized.
- T-Rex weighed ~7 metric tons — significantly heavier than the next-largest carnivores like Giganotosaurus, which matched it in length but were only 2/3 to 3/4 the mass.
- T-Rex eyes were tennis-ball sized; Hone suspects they were primarily nocturnal hunters, and the “stand still” survival tactic from Jurassic Park is nonsense given their visual acuity.
- Typical predator prey is 5–20% of the predator’s body mass, meaning T-Rex likely ignored adult Triceratops and hadrosaurs most of the time — hunting them risked injury with low caloric payoff.
- Confirmed T-Rex cannibalism: a T-Rex foot bone shows multiple feeding-scrape bite marks with no healing, ruling out combat as the explanation.
- Birds are literally dinosaurs — their lineage traces directly to small dromaeosaurs close to Velociraptor, and birds lived alongside non-avian dinosaurs for ~100 million years before the extinction.
- Feathers appear in middle Jurassic Tyrannosaurs (~165 million years ago), predating bird origins by ~100 million years; likely evolved for insulation first, then co-opted for sexual display.
- The KPg extinction killed dinosaurs primarily because they were large and terrestrial — big animals need more range, and land barriers trap them when climate shifts rapidly.
- Protoceratops is arguably the most scientifically valuable dinosaur specimen set: 100+ skeletons from embryo to adult, one location, one narrow time window — enabling real population-level analysis impossible with most species.
Guests: Dave Hone, paleontologist at Queen Mary University of London, co-host of Terrible Lizards podcast · 2025-09-04 · Watch on YouTube
