Riley Black

Riley Black

 

Riley Black is the author of The Last Days of the Dinosaurs and many other books. She is a science correspondent for Smithsonian magazine covering fossils and natural history, and she writes about the prehistoric past for a variety of publications. 

The handbones seen in the whale model in the center of this image tell the curious story of how whales went from land to water.

What’s a "Missing Link"?

While some still use the term, experts abhor it because it implies that life is a linear hierarchy

What's a dinosaur, anyways? The answer is in the evolutionary tree.

What Makes a Dinosaur a Dinosaur?

The question may sound like a "duh," but it gets to the heart of how we categorize and define nature

An illustration of the raccoon-like Sinosauropteryx, which lived 130 million years ago in the Early Cretaceous.

This Adorable Bandit-Faced Dinosaur Will Steal Your Heart

Some dinos were small, fluffy and frankly adorable, a new analysis shows

An artist's illustration of Patagotitan mayorum, the latest and possibly most gargantuan in a series of recent giant dino finds.

Did Scientists Just Unveil the Biggest Dinosaur of All Time?

The jury's still out—but if you can get over the size contest, far more fascinating patterns about these giants emerge

An illustration of the spiky new dinosaur Zuul.

Introducing 'Zuul,' an Ankylosaur That Could Really Make Your Ankles Sore

A finely preserved fossil sheds new light on the curious tail of armored dinos

The Tsavo lions' teeth bore marks indicating that they ate soft food, similar to those seen on the teeth of captive lions today. Wild lions, like these pictured in South Africa's Greater Kruger National Park, show different microwear patterns.

Man-Eating Lions of Tsavo Did Indeed Eat People, Teeth Reveal

Dental clues confirm some rumors about the ravenous cats of Tsavo, while also raising new questions

An artist's rendering of the new species Teleocrater rhadinus hunting a cynodont, a close relative of mammals.

Before There Were Dinosaurs, There Was This Weird Crocodile-Looking Thing

A new analysis of an ancient enigma offers clues as to how dino evolution unfolded

How did the sabertooth cat wield its excess of tooth?

How Did Sabercats Use Those Outlandish Fangs?

We’ve barely scratched the surface of how this charismatic cat utilized its dental cutlery

Most regular visitors of Chicago's Field Museum are on a first-name basis with Sue, the Tyrannosaurus rex skeleton that adorns the museum's front hall.

From “T. Rex” to “Pantydraco": How Dinosaurs Get Their Names

The best monikers are “a way to link science and imagination.” Others are just obvious

It may not be pretty, but meat eating has been a critical factor in creating the fossil record.

Why Paleontologists Should Love Meat-Eaters

… Particularly the ones that feasted on human flesh. Thanks, guys!

An illustration of Australia's past megafauna.

Changing Climate, Not Humans, Killed Australia’s Massive Mammals

But that mass extinction could help us predict what today’s human-wrought climate change may bring

An artist's rendering of the "badger otter."

You Wouldn't Want to Cuddle This Giant Prehistoric Otter With a Crushing Bite

The “badger otter” has some serious teeth, which had mystified paleontologists until now

Erich Fitzgerald and Tim Ziegler with a 3D model of Alfred's skull.

The Earliest Baleen Whales Literally Sucked

No offense to toothy whale ancestors

The Field Museum's famed T-Rex Sue may be long dead, but she still requires a lot of TLC.

Preserve and Protect: How Paleontologists Care for Their Long-Dead, High-Maintenance Stars

Fossil collections are where the science of paleontology truly lives. Valuable dino bones must be treated accordingly

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.

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