Skip to main content

Giant lizard named for Jim Morrison tells tale of climate change

By Ben Brumfield, CNN
updated 11:41 AM EDT, Wed June 5, 2013
When paleontologist Jason Head discovered
When paleontologist Jason Head discovered "Bearded King Morrison," he had been listening to The Doors on an "endless loop."
STORY HIGHLIGHTS
  • Lizard's size confirms elevated global temperature during Paleocene greenhouse period
  • The cold-blooded animals depend on warmth from their surroundings to heat their bodies
  • Man-made global warming in the 21st century pushing temperatures back up in that direction

(CNN) -- To get through the long, tedious hours sitting in the fossil archives at the University of California-Berkeley, Jason Head would listen to the hypnotic sounds of The Doors.

So when he happened upon one of the biggest lizards that ever walked on land, he found it fitting to name it after the band's frontman, Jim Morrison -- the original Lizard King.

But that's not what makes this find interesting. It's what the existence of the "Bearded King Morrison" tells us about the effects of climate change that's intriguing.

The climate connection

\
"Bearded King Morrison," known scientifically as Barbarurex morrisioni, was six feet long.

Lizards, like snakes and turtles, are cold-blooded animals. They depend on warmth from their surroundings to heat their bodies.

And when the environment warms up, they become more active, get hungrier, eat more and grow.

For six years, Head sifted through fossils of animals that lived 40 million years ago, looking for clues on climate change.

Then it jumped out at him: The Bearded King Morrison, as Head named his now-extinct lizard. Head and his team introduced it in a study to be published Wednesday by research journal Proceedings of the Royal Society B.

"It struck me that we had something here that was quite large and quite unique," he said.

Skeptical environmentalist & a scientist
Glaciers melting around the world
Global warming brings on more pollen
Climate change in India

The find was striking, because when it comes to climate trends, bigger reptiles point to a warmer climate, Head said.

"One of the things you can actually do is estimate past temperatures by looking at the body size of fossil reptiles," said Head, a paleontologist who studies the Earth and its atmosphere at the University of Nebraska-Lincoln.

The lizard's hefty size helped confirm the elevated global temperature during a period known as the Paleocene greenhouse.

"This would be a globally warmed time in Earth's history, where there's no ice at the poles," Head said. There was a lot of carbon dioxide in the atmosphere back then.

Sound familiar?

Man-made global warming in the 21st century is pushing temperatures back up in that direction, he said.

Current average temperatures are only about 2.5 degrees Celsius shy of where they were 40 million years ago, Head said, when the Bearded King Morrison grazed in the forests of what is now Myanmar.

The Doors connection

The lizard's proper scientific name is Barbarurex morrisioni, and there is a backstory to how Head arrived at it.

The Doors is Head's favorite 60's rock band.

The Doors' founder Ray Manzarek dies at 74

"I had their albums going on kind of endless loop while we were writing and doing the analysis on the lizard," he said.

The size of the lizard took him by surprise. It reminded him of the nickname of now deceased Doors singer Morrison, also known as the Lizard King. Morrison also had a reputation for standing up for the environment.

The king-size lizard, the ecological connection. For Head, the name fit.

The Bearded King Morrison was no dinosaur. It was smaller than today's crocodiles and Komodo dragons.

But those are carnivorous reptiles. This was an herbivore. It ate plants.

It was six feet long and weighed as much as a German shepherd, pretty sizable for a lizard.

Head says he hasn't found fossil records that show why the creature eventually went extinct.

The big deal

The evolution of such a large reptile shows what a huge effect a slight warming bump can have, Head said. With the ice caps gone, Earth's climate became warm and muggy, and forest covered the planet.

There was plenty of greenery for the chubby lizard to munch through.

As man-made climate change progresses, existing reptiles will spread out into new territory, Head predicts.

So can we see another spurt of such giant lizards?

Unlikely.

For them to evolve to the size of the Bearded King Morrison, they would require global temperatures to slowly rise a few degrees and then remain stable for a very long time.

Today's climate is warming so rapidly that "we'll basically block off their ability to respond to the temperature increase," Head said.

Instead of evolution, he said, we'll see extinction.

Or, as Morrison sang, "This is the end, my only friend."

More space and science news from CNN Light Years

Follow @CNNLightYears on Twitter

ADVERTISEMENT
Part of complete coverage on
Science news
updated 10:12 AM EDT, Thu March 20, 2014
For a Tyrannosaurus rex looking for a snack, nothing might have tasted quite like the "chicken from hell."
updated 6:29 PM EDT, Fri March 14, 2014
Everyone is familiar with Tyrannosaurus rex, but humanity is only now meeting its much smaller Arctic cousin.
updated 12:12 PM EST, Thu March 6, 2014
At about 33 feet long, weighing 4 to 5 tons and baring large blade-shaped teeth, the dinosaur Torvosaurus gurneyi was a formidable creature.
updated 6:43 AM EST, Fri February 21, 2014
This Pachyrhinosaurus can go to the head of its class.
updated 8:04 AM EDT, Thu March 27, 2014
Science is still trying to work out how exactly we reason through moral problems, and how we judge others on the morality of their actions. But patterns are emerging.
updated 7:06 PM EST, Thu February 27, 2014
A promising way to stop a deadly disease, or an uncomfortable step toward what one leading ethicist called eugenics?
updated 8:07 PM EST, Fri February 14, 2014
Seattle paleontologists safely removed the largest fossilized mammoth tusk discovered in the region from a construction site.
updated 4:37 PM EST, Fri February 14, 2014
For the first time, scientists have created human lungs in a lab -- an exciting step forward in regenerative medicine.
updated 6:13 AM EDT, Tue April 23, 2013
A mysterious, circular structure, with a diameter greater than the length of a Boeing 747 jet, has been discovered submerged about 30 feet underneath the Sea of Galilee in Israel.
updated 7:55 AM EST, Wed February 12, 2014
Tiny rocket-shaped metal particles might one day take a wild ride inside your body.
updated 3:11 PM EST, Thu February 6, 2014
Ten years ago on New Year's Eve, Dennis Aabo Sorensen was launching fireworks when a defective rocket blew up. He was rushed to the hospital, and his left hand was amputated.
updated 5:25 PM EST, Fri January 17, 2014
Every corner of the planet offers some sort of natural peculiarity with an explanation that makes us wish we'd studied harder in junior high Earth science class.
updated 12:43 PM EST, Thu January 9, 2014
There is a light show in the ocean that you can't see, but many fish can. There's quite a display of neon greens, reds, and oranges going on underneath the surface.
updated 7:53 PM EST, Sat December 14, 2013
One trillionth of a second after the Big Bang is the timeframe that physicist Joe Incandela knows well.
updated 11:57 AM EST, Tue November 26, 2013
Scientists have uncovered archaeological evidence of when Buddha's monumentally influential life occurred.
updated 8:20 AM EST, Thu November 14, 2013
Deep in a remote, hot, dry patch of northwestern Australia lies one of the earliest detectable signs of life on the planet, tracing back nearly 3.5 billion years, scientists say.
updated 8:15 AM EST, Sun November 3, 2013
Four top environmental scientists raised the stakes Sunday in their fight to reverse climate change and save the planet.
updated 5:52 PM EDT, Fri October 18, 2013
A new study suggests that a group of marine species with claw-like structures emerging from their heads were related to spiders and scorpions.
updated 12:04 PM EDT, Sat October 19, 2013
The most complete early human skull has been found in the European country Georgia.
updated 3:10 PM EDT, Wed September 4, 2013
We leave genetic traces of ourselves wherever we go -- in a strand of hair left on the subway or in saliva on the side of a glass at a cafe.
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT