Riley Black

Riley Black

 

Riley Black is a freelance science writer specializing in evolution, paleontology and natural history who blogs regularly for Scientific American.

The well-known dinosaur skeleton known as "Big Mama" has been hiding a secret.

Fossilized Dinos Are Bones Turned to Stone—But Sometimes, Part of the Original Dino Survives

Every fossilized skeleton is a unique snowflake. We now know that some contain biological bits of tooth and claw

A spotted hyena in South Africa's Kruger National Park.

North America Used to Have its Very Own Hyena

These giggly beasts didn’t just roam Africa and the Middle East. They were right here in our backyard

Computer image of Triopticus skull overlaid on the field site where it was found.

Paleontologists Probe the Bonehead that Foreshadowed Domed Dinos

This striking skull shape evolved at least twice. But what was its purpose?

In an artist's interpretation, the forested and warm Late Cretaceous is abruptly destroyed by a six-mile wide asteroid.

Life Bounced Back After the Dinosaurs Perished

The devastation was immediate, catastrophic and widespread, but plants and mammals were quick to take over

The fossil Arktocara yakataga (resting on an 1875 ethnographic map of Alaska) belonged to a dolphin that swam in subarctic marine waters around 25 million years ago.

Smithsonian Researchers Uncover Extinct, Ancient River Dolphin Fossil Hiding in Their Own Collections

Sometimes, paleontologists don’t have to go into the field to discover a tantalizing new species

An artist's rendering of Chicxulub, the asteroid believed to have wiped out large dinosaurs and reshaped parts of the world.

What Happened in the Seconds, Hours, Weeks After the Dino-Killing Asteroid Hit Earth?

The Cretaceous forecast: Tsunamis, a deadly heat pulse, and massive cooling.

Illustration of a Velafrons, a hadrosaur whose name means "sailed forehead."

Chew on This: Powerful Jaws Fueled a Jurassic Herbivore Boom

Teeth, not flowers, might be the key to the duckbills’ success

Giant sauropods' feet didn't just leave footprints for future paleontologists to find, but changed landscapes entirely.

Dinosaurs Literally Reshaped The Planet

Dinos didn't just leave behind footprints and fossil bones—they also changed the landscapes in which they lived

Illustration of Gualicho shinyae hunting with its jaws, not arms.

Arm Day at the Gym Apparently Not a Thing for Newly Found, Tiny-Armed Dino

Turns out <i>T. rex</i> doesn’t have a copyright on those adorably awkward, itty-bitty arms

Portrait of paleontologist Mary Anning and her trusty assistant, Tray.

These Paleo Pets Made Fossil Hunting Less Lonely

In the solitary hunt for bones, furry companions provide company, act as field assistants and sometimes even make the ultimate sacrifice

You'll never guess how researchers found this fossil of the petite terrestrial crocodile Hoplosuchus kayi.

These Are Some of the Weirdest Ways Paleontologists Find Fossils

Sometimes you pee on them, sometimes you’re just trying to get away from other paleontologists. Here are the discovery stories scientists won’t tell you

Pie chart showing the number of times ankylosaur fought a particular foe.

Sadly, “Ankylosaur Fight Club” Is Probably Wishful Thinking

Ornate armor may have had more to do with communication than combat

A reconstruction of Fruitachampsa, a Jurassic-era crocodile discovered in the Fruita Paleo Area and named in 2011. Small animals like Fruitachampsa help paleontologists reconstruct what life was really like in the Jurassic period.

In This Jurassic Boneyard, It's Not Size That Counts

A rich cache of fossils in Colorado is valuable not for the big dino bones but the relatively tiny fossils that are still being dug up.

Little penguins are the only penguins now found in Australia.

Australia Used to be a Haven for Giant Penguins

A single species, the little penguin, is left on Aussie shores today

An artists' rendering of Machairoceratops cronusi, or "bent sword face." Machairoceratops was found in 77-million-year-old rock in southern Utah.

Two New Discoveries Add to a Horned Dino Revolution

Twenty years ago, there were about 23 horned dinosaurs. Today, the count has more than tripled

Atopodentatus used its odd-shaped head to vacuum up food from the sea floor hundreds of millions of years ago.

Weirdo Ancient Marine Reptile Had a Vacuum-Shaped Head

Animal probably slurped up plant material from the seafloor

Woolly mammoths were mixing it up with other mammoths in North America, new research shows.

North American Mammoths May Have Been a Single Species

Woolly mammoths and other varieties may have been intermingling, DNA analyses show

The footprints of ankylosaurs and other 122-million-year-old dinosaurs are preserved outside Moab, Utah.

Paleontologists Unveil Dinosaur Stomping Ground in Utah

Visitors can view ghostly footprints that record prehistoric steps in pale blue stone

T. rex had tiny arms. But that’s no reason to mock the dinosaur.

Stop Making Fun of Tyrannosaurs’ Tiny Arms

The stubby limbs may seem out of place, but they may have been key to the <i>T. rex’s</i> terrifying bite

When Dinosaurs Roamed the (Not Yet) Petrified Forest

Recent surprise discoveries at the national park have prompted a complete rethinking about the creatures of the Jurassic Era

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