Meet the juvenile T-rex fossil discovered by three kids

“Discovering Teen Rex” at the Denver Museum of Nature & Science tells the roaring story.
5 min. read
Liam (kids, left to right), Kaiden and Jessin stand with Sam Fisher (right) and Denver Museum of Nature and Science associate curator of vertebrate paleontology Tyler Lyson in the Teen Rex exhibit they helped create, by discovering a rare juvenile tyrannosaurus fossil near their home in North Dakota. June 21, 2024.
Kevin J. Beaty/Denverite

Tyler Lyson has come to expect “finds” from his old high school buddy, Sam Fisher.

Now the Curator of Paleontology at the Denver Museum of Nature & Science, Lyson has spent time in the Badlands of North Dakota, where Fisher and his family reside. It's an area rich with prehistoric potential.

“It's one of the best places in the world to find dinosaur fossils,” Lyson said.

And it’s certainly not uncommon for Fisher to go out hiking and digging and poking around for bones, usually with his sons, Jessin and Liam, and his nephew, Kaiden Madsen, along for the ride — to the point that, chuckles Sam, “I’ve got Tyler on speed dial.”

As often as they traverse the target-rich environment, Lyson said he expected the group to come upon something someday.

But more often than not, he admitted, the group’s texts and photos, barely elicited more than a, “That’s nice.”

Finding something better than 'nice'

So when “the” moment finally came, in July of 2022, Lyson was this close to missing it. There was, to be sure, another picture — an adorable shot of Liam, all 3-feet-8 of him, cozied up alongside the leg of some prehistoric-looking creature that was just about as long as he was.

Even so, initially, Lyson’s thoughts were only slightly more elevated than “nice.”

Tyler Lyson, the Denver Museum of Nature and Science's associate curator of vertebrate paleontology, points out a tyrannosaurus tooth embedded in soil, part of a more complete fossil found by a family in North Dakota. June 21, 2024.

“They'd been looking for fossils for a long time, so I was just so happy for the family that they'd made this discovery,” he said. “And then when I started looking at the photos, I thought it was a duckbill, just based on the knee joint that was exposed that they found, it looked like a duckbill.”

But as he looked closer, Lyson realized what he was really looking at.

The fossil Fisher and the kids had unearthed wasn’t a duckbill or even a triceratops, but something else entirely — a Tyrannosaurus rex. And not just any T-rex, but a kid-sized version of the creature.

Which made the find a pretty big bang.

A replica of a juvenile tyrannosaurus skull, similar to one that will be extracted from soil here in the Denver Museum of Nature and Science's new Teen Rex exhibit. June 21, 2024.
Kevin J. Beaty/Denverite

“Well, this story of discovery, a find like this of these kids and their dad going out looking for fossils and finding one, I mean, I think it's one in a couple billion,” Lyson said. “If you look at it from a scientific point of view, there's about over 100 T-Rex specimens known, but most of those are only known based on a handful of bones.”

“And so there's only about 20 or 30 that are, say 25 percent or more complete. And of those, there's only five or six that are juveniles. So finding a juvenile tyrannosaurus is exceedingly rare. And then to have it be found by these kids I think is just incredible.”

Unearthing 'The Brother'

Needless to say, the discovery set off a flurry of activity.

The fossil was on grounds belonging to the Bureau of Land Management, which meant that the excavation could only be done with a permit and by someone who’s part of a federal depository. Like, say, the Denver Museum of Nature & Science.

Once acquired, last summer Lyson led a team that unearthed the dinosaur, which the boys named “The Brother.”

“Because me and Justin are brothers and (Kaiden) feels like a brother to us,” Liam said, “And the T-Rex is a brother to us.”

The Fisher family stands with Denver Museum of Nature and Science researchers during a press conference announcing a new exhibit featuring a rare juvenile tyrannosaurus fossil that they found near their home in North Dakota. June 21, 2024.
Kevin J. Beaty/Denverite

Not only were they part of the team, the trio had featured roles in a new documentary, “T-Rex,” which is being shown at the museum’s Infinity Theater.

On Friday, the boys were also front and center at a press conference heralding the find.

A temporary exhibit, “Discovering Teen Rex,” is now open, allowing the public to watch as the fossil is prepped in real-time.

The next adventure

As the Fishers took in the magnitude of what had been accomplished by their kids, mom Danielle shed a tear.

“She’s a natural bawler,” Jessin joked. “She saw that sign out front and just started crying.”

“Two years ago when they thought they found a dinosaur, I was like, ‘Okay, cool, whatever,’” Danielle said. “But then when they said it was a T-Rex, I had to walk off because I started bawling.”

“Now, when they’re going hiking ... I’m like, ‘Let’s go — I want to be there for the next one.’”

Tyler Lyson, the Denver Museum of Nature and Science's associate curator of vertebrate paleontology, stands with his colleagues and the Fisher family as they announce a new exhibit centered around the rare juvenile tyrannosaurus fossil the Fishers found near their home in North Dakota. June 21, 2024.

But according to Liam, the next time won’t be nearly as good as the first time.

“I think my mom was crying because it was bittersweet for her; she was happy and sad," he said. "She was happy that we found it but she was sad because it was a once-in-a-lifetime experience for us.”

“But that’s because we’re kids; when we get older, we’re going to find more and more and more of them. And we know we're going to put them in this museum — exactly in this place.”

The tooth of a rare juvenile tyrannosaurus fossil sticks out of soil brought to the Denver Museum of Nature and Science from North Dakota, where it was discovered by the Fisher family. June 21, 2024.
Kevin J. Beaty/Denverite

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