Dinosaurs weren't so cool

Absurdly, birds are dinosaurs. Palaeontologists insist they're close relatives, but to nearly everyone else these animals polar opposites. Birds graceful, musical, fluffy and so athletic that many travel between continents without resting. In contrast, dinosaurs hardly seem graceful. They're at once fierce, scaly monsters fodder for goofy cartoons because of features like Brachiosaurus’s oversized neck or Tyrannosaurus’s clumsy arms. But despite their apparent differences, somehow, theropods – the dinosaur group includes T. rex. This bird–dinosaur connection is increasingly clear in fossil record, which fossils feathered winged dinosaurs, suggesting weren't as reptilian movies depict. And now, biggest departure yet from Jurassic Park, new evidence shows plenty even cold blooded (ectothermic). Like mammals, warm (endothermic). have highest metabolisms all living much this energy spent on keeping bodies warm. when did warm-blooded evolve? Was it recent, ancestral heat themselves, too?To investigate, a team scientists across USA Spain, led by Jasmina Wiemann Derek Briggs (Yale University), found way check an animal's metabolism scanning bones, after they fossilized, some biological molecules remain. it's unrealistic extract those molecules, you can't grind up precious artefacts test what's inside. Instead, researchers used harmless light scan destroying touching them. When illuminated with infrared light, each chemical responds its own unique scattering signature. Using signature, could tell biomolecules were preserved fossilized eggshells, teeth turned out be metabolic waste products. With scans, revealed details about how burned, though had been extinct millions years.The applied technique detect any remaining well bones modern-day reptiles, mammals birds, whose rates already known estimate dinosaurs’ rates. Surprisingly, more varied than expected. Some slow metabolisms, including plant-eaters such spikey Stegosaurus three-horned Triceratops, line modern cold-blooded reptiles. However, others faster, bird-like flying pterosaurs turkey-sized predator Velociraptor. fact, rex, blooded.The then made family tree track bloodedness evolved, seems closely related reptiles lived time evolved once. addition, investing heating paid off: every bloodedness, quickly moving. For example, plesiosaurs marine behemoths grew almost long ten-pin bowling lane probably began swim became blooded. appears increased right before started fly. Velociraptor rex learned walk two legs. Remarkably, bipedal arms free evolve into wings, benefiting ancestors’ high fuel flight.Despite work, I still imagine grace, why study fascinating: bridges divide. Our simplistic notions dissolving, causing us rethink we typecast bland reptilians. reality, diverse interesting anything Park.