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Mosasaurs, prehistoric ‘sea’ monsters, lurked in rivers, too
4+ hour, 52+ min ago (1724+ words) A fossil tooth rewrites where some of these giant mosasaurs lived This illustration depicts hunting freshwater mosasaurs " one in the act of feeding " at a site in North Dakota now known as the Hell Creek Formation. Mosasaurs " a fearsome group…...
Let’s learn about Tyrannosaurus rex
1+ week, 6+ day ago (975+ words) Many open questions remain about this iconic dinosaur's appearance, speed, brainpower and more Tyrannosaurus rex truly was a fearsome predator in its time. This scene gets some things about T. rex right. But other aspects don't quite match what paleontologists know…...
Here’s why ammolite gems have a rainbow shimmer
1+ mon, 3+ day ago (911+ words) The colorful flair in these fossils comes down to crystal thicknesses and spacing Ammolite gems are some pretty fabulous fossils. They sport a rainbow flair that comes from tiny features in their crystal plates. January 20, 2026 at 6:30 am Ammolites are some…...
Newfound fossil is not a teen T. rex but a whole new species
1+ mon, 2+ week ago (1587+ words) This Nanotyrannus would have roamed alongside T. rex in the late Cretaceous Family feud? A juvenile'T. rex fends off a pack of'Nanotyrannus in the Late Cretaceous Period. It's an artist's depiction of dinosaur diversity at a site now known as Hell…...
Baby pterosaurs likely died in violent Jurassic storms
4+ mon, 2+ day ago (1017+ words) Fossils from Germany suggest violent winds downed the young flyers 150 million years ago An artist's depiction of a Pterodactylus hatchling as it struggles to fly in powerful storm winds. The broken wings of two pterosaur hatchlings point to how hundreds…...
Fossil teeth reveal some dinos were fussy eaters
4+ mon, 1+ week ago (959+ words) Calcium in dinosaur teeth suggests which parts of plants an herbivore preferred Researchers analyzed the tooth enamel from animals that roamed the U.S. West some 150 million years ago. These included (from left)Allosaurus,Apatosaurus, a herd ofDiplodocusand twoCamptosaurus.The new study…...
New clues about dino speed come from birds strutting through mud
6+ mon, 1+ day ago (1423+ words) The math used in the past to calculate how fast dinosaurs ran might not add up after all If a dinosaur like T. rex ran on mud 100 million years ago, can we say how fast it was? Experiments with guinea fowl…...
North American rhinos once gathered in large, hippo-like herds
6+ mon, 3+ week ago (1554+ words) They died off when a supervolcano's ashfall smothered their world Fossils of the rhino Teleoceras (shown) are among the most common ancient herbivores found at Ashfall Fossil Beds State Historical Park in northern Nebraska. The animals died roughly 12 million years…...
Questions for ‘Could Spinosaurus swim? That would make it a game changer’
9+ mon, 2+ week ago (236+ words) Questions for "Could Spinosaurus swim? That would make it a game changer" - Pick one dinosaur and describe two of its key traits. Based on your knowledge, how did this dinosaur move from one place to another? What physical characteristics led…...
Analyze This: Why the fastest creatures are neither tiny or huge
9+ mon, 4+ week ago (925+ words) Carolyn Wilke is a former staff writer at Science News Explores. She has a Ph.D. in environmental engineering. Carolyn enjoys writing about chemistry, microbes and the environment. She also loves playing with her cat. There's a sweet spot where muscles…...