metabolism

A broken rib from the world’s largest T. rex hid a 66-million-year-old secret

bone metabolism pathology fossil Dinosauria Tyrannosaurus skeleton

A broken rib from Scotty, the largest known T. rex skeleton, contains an extraordinary fossilized network of blood vessels formed while the dinosaur was healing. Scientists used neutron and X-ray imaging to look inside the 66-million-year-old bone without damaging it, revealing details rarely preserved in fossils.

24/09/2026 sciencedaily

A 66-million-year-old tooth reveals T. rex was nearly as warm as a human

tooth metabolism predator Dinosauria Tyrannosaurus discovery

Chemical clues preserved inside fossilized T. rex teeth reveal that the dinosaur maintained a body temperature of about 97 degrees Fahrenheit, almost identical to humans. The finding provides direct evidence that the giant predator was warm-blooded, helping explain how it stayed active and survived in chilly environments as far north as Alaska.

20/09/2026 sciencedaily

Tyrannosaurus rex Had Mammal-Like Body Temperature, Study Finds

tooth metabolism predator Tyrannosaurus study

A new analysis of Tyrannosaurus rex teeth indicates the ancient predator maintained a body temperature of about 36.3 degrees Celsius (97.3 degrees Fahrenheit), close to that of Indian and African elephants and far warmer than its cold-blooded reptile neighbors. The post Tyrannosaurus rex Had Mammal-Like Body Temperature, Study Finds appeared first on Sci.News: Breaking Science News.

18/09/2026 sci-news

Scientists finally solved the mystery of Earth's greatest mass extinction

metabolism extinction study

Why do beaches today have seashells from clams and snails instead of brachiopods? A new study suggests the answer lies in Earth's greatest mass extinction, when warming oceans and falling oxygen levels wiped out animals that couldn't adapt. Species with body plans and metabolisms better suited to the changing conditions survived and went on to dominate the seas, offering a glimpse of how modern marine life could respond to climate change.

12/07/2026 sciencedaily

Scientists resurrect 3.2-billion-year-old enzyme to reveal how life began on Earth

metabolism evolution genetics

Researchers rebuilt long-extinct versions of a crucial enzyme that helps make nitrogen available to life, offering an unprecedented glimpse into Earth’s distant past. The breakthrough could aid the search for extraterrestrial life while helping scientists tackle future food-production challenges on Earth and beyond.

08/07/2026 sciencedaily-paleo