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An illustration of Thanatotheristes degrootorum.

A new T. rex relative called the ‘reaper of death’ has been discovered in Canada

Not all tyrannosaurs were as big as the T. rex. A tinier T. rex cousin, called the "reaper of death," was recently found in Alberta.
In the 1997 movie "The Lost World: Jurassic Park," a herd of stegosaurus meet a group of scientists.

Dozens of discoveries have upended our pictures of T. rexes, raptors, and other dinosaurs. Here’s how the ‘Jurassic Park’ movies hav...

Since "Jurassic Park" came out, paleontologists' understanding of dinosaurs has changed. We now know far more about how they looked and acted.

Paleontologists are unraveling the mysteries of young T. rexes. Creatures they thought were 2 species turned out to be kids and adults.

A full-grown Tyrannosaurus rex weighed up to 10 tons and was 43 feet long. Much of its growth happened during its teenage years.
An illustration of what the Siberian steppe looked like during the Pleistocene epoch, with woolly mammoths in the center.

A new study reveals how the last woolly mammoths died out 4,000 years ago. That’s after the Egyptians had built the pyramids.

The last of the woolly mammoths died on an Arctic island 4,000 years ago, meaning these animals went extinct much later than scientists once thought.
A velociraptor from the 2015 film "Jurassic World."

The iconic velociraptor scene in ‘Jurassic Park’ would have been different — and unscientific — if Spielberg had gotten h...

In "Jurassic Park," velociraptors hunt two children in a kitchen. Originally, Spielberg wanted the raptors to have forked tongues like snakes.
A full-grown Tyrannosaurus rex weighed between 6 and 9 tons and was up to 43 feet long.

The T. Rex had the strongest bite of any land animal ever — and new research shows the dinosaur really could crush a car

Scientists have discovered that T. rexes had rigid skulls, which enabled the dinosaurs to have the strongest bite force of any land animal on Earth.
Ancient Australia was home to strange marsupial giants, some weighing over 2,200 pounds.

For millions of years, eastern Australia was home to 2,200-pound marsupials with giant claws

A group of now-extinct marsupials named palorchestids once roamed eastern Australia. These giants weighed up to 2,200 pounds and had large claws.
An artistic reconstruction of the extinct short-faced kangaroo.

More than 40,000 years ago, giant kangaroos roamed Australia. Their jaws were surprisingly similar to those of pandas, a new study found.

Extinct Australian kangaroos weighed more than 250 pounds and had powerful jaws to crunch through tough vegetation, much like today's giant pandas.

For the first time, a timeline reveals what happened in the minutes and hours after the asteroid crash that killed the dinosaurs

The dinosaurs' extinction was spurred by an asteroid that struck Earth. By studying the crater, scientists now know what happened after the impact.
A facial reconstruction of the 3.8 million-year-old Australopithecus anamensis specimen found in Ethiopia in 2016.

Anthropologists have found the oldest skull of one of our earliest human ancestors. The 3.8 million-year-old fossil changes our understanding of human...

Australopiths were human ancestors that lived 4.2 million years ago. A new skull fossil is changing our understanding of these ancient hominins.