Unusual "Sail-Backed" Dinosaur Roamed Spain 125 Million Years Ago
Dubbed morelladon, fossil remains of a medium-size dinosaur discovered near the town of Morella in Spain's Castellón province
Dinosaurs215 articles archived since 1845
Dinosaurs Evolved in a Startlingly Short Time
New fossil dates show beasts arose from their ancestors in half the time researchers previously thought
An Ancient Nessie? Long-Neck Dinos Once Prowled Scottish Lagoon
Researchers made the discovery after noticing dinosaur footprints along the Isle of Skye's rocky coast—an area that was a lagoon during the Jurassic
![How Dinosaurs Got Their Start—and Met Their End [Video]](https://static.scientificamerican.com/sciam/cache/file/93CBBE6E-16DD-4FBF-87D85A18A0EB9974_agenda.jpg?w=275&h=154&fit=crop)
How Dinosaurs Got Their Start—and Met Their End [Video]
The only thing more remarkable than the ascent of these amazing beasts is their downfall
Did Dark Matter Kill the Dinosaurs? A Q&A with Author Lisa Randall
In her new book Randall probes the connections between seemingly unrelated phenomena in our universe
Dino's Tail Might Have Whipped It Good
Researchers built a physical model of the tail of the late Jurassic dinosaur Apatosaurus and found that its tail tip could have moved at supersonic speed to produce a whip-crack sound
‘Cute Furball’ Is Best-Preserved Mammal from Dinosaur Age
Chipmunk-sized critter with hedgehog-like spines lived 125 million years ago, leaving behind complete skeleton and soft tissues
Ancient Toothy Mammal Survived Dino Apocalypse
Hiding out in what is now New Mexico, beaver-like animal used specialized dentition to live on plants
New Fossil Reveals Velociraptor Sported Feathers
Real velociraptors hardly resembled the huge scaly lizards shown in Jurassic World
How Dinosaurs Shrank and Became Birds
Modern birds appeared to emerge in a snap of evolutionary time. But new research illuminates the long series of evolutionary changes that made the transformation possible
![How I Dissected a <i>T. Rex</i> [Video]](https://static.scientificamerican.com/sciam/cache/file/69ED70AA-693E-46C8-B4C862DA75B077BA_agenda.jpg?w=275&h=154&fit=crop)
How I Dissected a T. Rex [Video]
Hint: it took chain saws, feathers and lots of latex, says vertebrate palaeontologist and evolutionary biologist Stephen Brusatte
Did Dinosaurs Walk on Their Fingertips at One Point?
Modern-day alligators may illustrate how dinosaurs went from two-legged to four
Bat-Winged Dinosaur Discovery Poses Flight Puzzle
A newly described tiny creature has forelimb bones thought to support aerofoil membranes
![Meet the New Tyrannosaurs [Video]](https://static.scientificamerican.com/sciam/cache/file/81E9C021-F2CF-49EE-928F46D11E86E172_agenda.jpg?w=275&h=154&fit=crop)
Meet the New Tyrannosaurs [Video]
Recent fossil discoveries fill in long-standing holes in Tyrannosaurus rex’s family tree
Tails Tell the Tale of Dinosaur Sex
Differences in the size and shape of tailbones offer a way to tell male and female fossils apart
The Brontosaurus Is Back
Decades after scientists decided that the famed dinosaur never actually existed, new research says the opposite
Fact or Fiction?: Dark Matter Killed the Dinosaurs
A new out-of-this-world theory links mass extinctions with exotic astrophysics and galactic architecture
Mystery of Darwin's "Strange Animals" Solved
An analysis using ancient collagen protein could permit the study of fossils older than DNA allows
Duck-Billed Dinos Gave T. rex a Run for Its Money
Hadrosaurs could outrun tyrannosaurusesbecause of the layout of the herbivores’ tail muscles
Birds Roost on New Evolutionary Tree
In a massive first-of-its-kind whole-genome analysis involving 48 bird species, researchers have created a new avian evolutionary tree. Steve Mirsky reports