Frozen in time: Scientists find rare fossil of dinosaur sitting on eggs with embryos inside | Canada News Media
Connect with us

Science

Frozen in time: Scientists find rare fossil of dinosaur sitting on eggs with embryos inside

Published

 on

Beneath the weight of 70 million-year-old rocks in Ganzhou City, China, lies the skeleton of a dinosaur nurturing its eggs.

This is the first fossil of its kind, as it shows an oviraptorosaur sitting upon a nest with ready-to-hatch embryos inside.

Matt Lamanna is a paleontologist and dinosaur researcher from the Carnegie Museum of Natural History. He is part of an international team of researchers who studied the remains and published their findings in the Science Bulletin journal in December.

He spoke with As It Happens host Carol Off about the significance of this discovery. Here is part of their conversation.

Matt, how rare is a find like this one?

Oh, this is as rare as they come.

People have found a few dinosaurs sitting on nests with their own eggs before, and they’ve found plenty of nests that contain embryos. But this is the first time the two have been combined in one single, spectacular fossil.

So because the animal was fossilized in this position, atop a nest of eggs that contain oviraptorosaur embryos — presumably its own — we think that this animal perished in the act of incubating its nest.

What would it have looked like?

Imagine a big ground bird, like an ostrich. Or … if you’re familiar with something like a cassowary … an ostrich relative that lives in Australia and New Guinea that has a crust on its skull.

This animal would look something like a cassowary or an ostrich, except with long, well-developed four limbs that were tipped with three big claws.

 

This 70-million-year-old fossil shows an adult oviraptorid theropod dinosaur sitting atop a nest of its eggs. (Shundong Bi/Indiana University of Pennsylvania)

 

Wow. And so it had feathers, but it didn’t fly, right?

Absolutely.

Now, what is the oviraptorosaur actually doing at the moment that it’s fossilized?

It was fossilized in what we think is an incubating position…. We think this is probably just due to erosion.

The head and neck were lost, as was part of the back and the end of the tail. But the rest of the animal is there … the forelimbs, the high limbs, part of the torso, part of the tail, part of the neck. And what’s there is crouched in the middle of a nest with its arms wrapped around the outer edge of the nest … a position very, very similar to what you see many modern birds do when they’re sitting on their nests.

We presume it was female, right?

We actually tried to test this in our study, but the results were inconclusive.

The reason why I say it’s uncertain is that some modern birds, such as ostriches, take turns with the male and female incubating the eggs.

Although it’s quite possible that this was a female, it’s also possible that this was the dad. And we don’t know for sure.

If the embryos are fairly well-developed, how close were they to actually hatching?

[We observed] seven of the embryos … out of the 24 eggs. There may be more embryos inside some of those eggs — or maybe all of them. All of those embryos are at relatively advanced developmental stages, but they’re slightly apart from one another.

That suggests that maybe the eggs in the top layer of the nest — the layer that was closest to the adult — hatched a little bit before the eggs in the next layer, and so on and so forth. So we think that they were close to hatching, but they might not have all hatched at the same time.

 

A skeletal reconstruction of the adult oviraptorid shows its preserved bones in white. (Andrew McAfee/Carnegie Museum of Natural History.)

 

And this oviraptorosaur had 24 eggs?

Yeah.

We don’t really go into the reasons for this on the paper, but I sometimes wonder whether these animals may have nested communally, like the way ostriches do, for instance.

[With] ostriches, multiple females can contribute to the nest and then, a single pair — a male and female — take turns incubating that nest.

If some of these embryos are pretty close to hatching and it appears that this dinosaur, male or female, is incubating them, does it change any assumptions or theories about oviraptorosaurs and their young?

I would say it doesn’t change all that much, but it provides some of the best evidence yet that oviraptorosaurs, and presumably many what we call non-avian dinosaurs, did probably nurture their young.

For instance, a few oviraptorosaurs have been found sitting on nests before. But some people have claimed that in those cases, the animal perished while it was in the act of laying its eggs, or maybe the animal was guarding its nest in the fashion that, say, alligators and crocodiles do today. In other words, hanging around and protecting the eggs, but not incubating them.

The combination of circumstances preserved here … provide some of the best evidence yet that oviraptorosaurs and potentially other dinosaurs incubated their nests.

 

Matt Lamanna is a paleontologist and dinosaur researcher from the Carnegie Museum of Natural History. (Carnegie Museum of Natural History)

 

To find this creature frozen in this moment with his or her young, what’s your theories as to how he or she died?

I’ll confess we didn’t really explore this question all that much in our study. But the rocks in which this fossil is preserved are mudstone. So in other words, it’s rock that’s formed from ancient mud, and seemingly quite a significant quantity of mud at that.

I sometimes wonder [if] something like a flash flood potentially [killed them]…. If that’s the case, if this animal hung around on top of its nest trying to protect its eggs to the very last as this flood was bearing down on it, starting to bury it in mud — I mean, that, to me, is devotion. That’s a devoted parent that’s doing everything it can to protect its offspring, even to the very end.


Written by Mehek Mazhar. Interview produced by Katie Geleff. Q&A edited for length and clarity.

Let’s block ads! (Why?)

Source link

Continue Reading

News

Here’s how Helene and other storms dumped a whopping 40 trillion gallons of rain on the South

Published

 on

 

More than 40 trillion gallons of rain drenched the Southeast United States in the last week from Hurricane Helene and a run-of-the-mill rainstorm that sloshed in ahead of it — an unheard of amount of water that has stunned experts.

That’s enough to fill the Dallas Cowboys’ stadium 51,000 times, or Lake Tahoe just once. If it was concentrated just on the state of North Carolina that much water would be 3.5 feet deep (more than 1 meter). It’s enough to fill more than 60 million Olympic-size swimming pools.

“That’s an astronomical amount of precipitation,” said Ed Clark, head of the National Oceanic and Atmospheric Administration’s National Water Center in Tuscaloosa, Alabama. “I have not seen something in my 25 years of working at the weather service that is this geographically large of an extent and the sheer volume of water that fell from the sky.”

The flood damage from the rain is apocalyptic, meteorologists said. More than 100 people are dead, according to officials.

Private meteorologist Ryan Maue, a former NOAA chief scientist, calculated the amount of rain, using precipitation measurements made in 2.5-mile-by-2.5 mile grids as measured by satellites and ground observations. He came up with 40 trillion gallons through Sunday for the eastern United States, with 20 trillion gallons of that hitting just Georgia, Tennessee, the Carolinas and Florida from Hurricane Helene.

Clark did the calculations independently and said the 40 trillion gallon figure (151 trillion liters) is about right and, if anything, conservative. Maue said maybe 1 to 2 trillion more gallons of rain had fallen, much if it in Virginia, since his calculations.

Clark, who spends much of his work on issues of shrinking western water supplies, said to put the amount of rain in perspective, it’s more than twice the combined amount of water stored by two key Colorado River basin reservoirs: Lake Powell and Lake Mead.

Several meteorologists said this was a combination of two, maybe three storm systems. Before Helene struck, rain had fallen heavily for days because a low pressure system had “cut off” from the jet stream — which moves weather systems along west to east — and stalled over the Southeast. That funneled plenty of warm water from the Gulf of Mexico. And a storm that fell just short of named status parked along North Carolina’s Atlantic coast, dumping as much as 20 inches of rain, said North Carolina state climatologist Kathie Dello.

Then add Helene, one of the largest storms in the last couple decades and one that held plenty of rain because it was young and moved fast before it hit the Appalachians, said University of Albany hurricane expert Kristen Corbosiero.

“It was not just a perfect storm, but it was a combination of multiple storms that that led to the enormous amount of rain,” Maue said. “That collected at high elevation, we’re talking 3,000 to 6000 feet. And when you drop trillions of gallons on a mountain, that has to go down.”

The fact that these storms hit the mountains made everything worse, and not just because of runoff. The interaction between the mountains and the storm systems wrings more moisture out of the air, Clark, Maue and Corbosiero said.

North Carolina weather officials said their top measurement total was 31.33 inches in the tiny town of Busick. Mount Mitchell also got more than 2 feet of rainfall.

Before 2017’s Hurricane Harvey, “I said to our colleagues, you know, I never thought in my career that we would measure rainfall in feet,” Clark said. “And after Harvey, Florence, the more isolated events in eastern Kentucky, portions of South Dakota. We’re seeing events year in and year out where we are measuring rainfall in feet.”

Storms are getting wetter as the climate change s, said Corbosiero and Dello. A basic law of physics says the air holds nearly 4% more moisture for every degree Fahrenheit warmer (7% for every degree Celsius) and the world has warmed more than 2 degrees (1.2 degrees Celsius) since pre-industrial times.

Corbosiero said meteorologists are vigorously debating how much of Helene is due to worsening climate change and how much is random.

For Dello, the “fingerprints of climate change” were clear.

“We’ve seen tropical storm impacts in western North Carolina. But these storms are wetter and these storms are warmer. And there would have been a time when a tropical storm would have been heading toward North Carolina and would have caused some rain and some damage, but not apocalyptic destruction. ”

___

Follow AP’s climate coverage at https://apnews.com/hub/climate

___

Follow Seth Borenstein on Twitter at @borenbears

___

Associated Press climate and environmental coverage receives support from several private foundations. See more about AP’s climate initiative here. The AP is solely responsible for all content.

Source link

Continue Reading

Science

‘Big Sam’: Paleontologists unearth giant skull of Pachyrhinosaurus in Alberta

Published

 on

 

It’s a dinosaur that roamed Alberta’s badlands more than 70 million years ago, sporting a big, bumpy, bony head the size of a baby elephant.

On Wednesday, paleontologists near Grande Prairie pulled its 272-kilogram skull from the ground.

They call it “Big Sam.”

The adult Pachyrhinosaurus is the second plant-eating dinosaur to be unearthed from a dense bonebed belonging to a herd that died together on the edge of a valley that now sits 450 kilometres northwest of Edmonton.

It didn’t die alone.

“We have hundreds of juvenile bones in the bonebed, so we know that there are many babies and some adults among all of the big adults,” Emily Bamforth, a paleontologist with the nearby Philip J. Currie Dinosaur Museum, said in an interview on the way to the dig site.

She described the horned Pachyrhinosaurus as “the smaller, older cousin of the triceratops.”

“This species of dinosaur is endemic to the Grand Prairie area, so it’s found here and nowhere else in the world. They are … kind of about the size of an Indian elephant and a rhino,” she added.

The head alone, she said, is about the size of a baby elephant.

The discovery was a long time coming.

The bonebed was first discovered by a high school teacher out for a walk about 50 years ago. It took the teacher a decade to get anyone from southern Alberta to come to take a look.

“At the time, sort of in the ’70s and ’80s, paleontology in northern Alberta was virtually unknown,” said Bamforth.

When paleontogists eventually got to the site, Bamforth said, they learned “it’s actually one of the densest dinosaur bonebeds in North America.”

“It contains about 100 to 300 bones per square metre,” she said.

Paleontologists have been at the site sporadically ever since, combing through bones belonging to turtles, dinosaurs and lizards. Sixteen years ago, they discovered a large skull of an approximately 30-year-old Pachyrhinosaurus, which is now at the museum.

About a year ago, they found the second adult: Big Sam.

Bamforth said both dinosaurs are believed to have been the elders in the herd.

“Their distinguishing feature is that, instead of having a horn on their nose like a triceratops, they had this big, bony bump called a boss. And they have big, bony bumps over their eyes as well,” she said.

“It makes them look a little strange. It’s the one dinosaur that if you find it, it’s the only possible thing it can be.”

The genders of the two adults are unknown.

Bamforth said the extraction was difficult because Big Sam was intertwined in a cluster of about 300 other bones.

The skull was found upside down, “as if the animal was lying on its back,” but was well preserved, she said.

She said the excavation process involved putting plaster on the skull and wooden planks around if for stability. From there, it was lifted out — very carefully — with a crane, and was to be shipped on a trolley to the museum for study.

“I have extracted skulls in the past. This is probably the biggest one I’ve ever done though,” said Bamforth.

“It’s pretty exciting.”

This report by The Canadian Press was first published Sept. 25, 2024.

The Canadian Press. All rights reserved.

Source link

Continue Reading

News

The ancient jar smashed by a 4-year-old is back on display at an Israeli museum after repair

Published

 on

 

TEL AVIV, Israel (AP) — A rare Bronze-Era jar accidentally smashed by a 4-year-old visiting a museum was back on display Wednesday after restoration experts were able to carefully piece the artifact back together.

Last month, a family from northern Israel was visiting the museum when their youngest son tipped over the jar, which smashed into pieces.

Alex Geller, the boy’s father, said his son — the youngest of three — is exceptionally curious, and that the moment he heard the crash, “please let that not be my child” was the first thought that raced through his head.

The jar has been on display at the Hecht Museum in Haifa for 35 years. It was one of the only containers of its size and from that period still complete when it was discovered.

The Bronze Age jar is one of many artifacts exhibited out in the open, part of the Hecht Museum’s vision of letting visitors explore history without glass barriers, said Inbal Rivlin, the director of the museum, which is associated with Haifa University in northern Israel.

It was likely used to hold wine or oil, and dates back to between 2200 and 1500 B.C.

Rivlin and the museum decided to turn the moment, which captured international attention, into a teaching moment, inviting the Geller family back for a special visit and hands-on activity to illustrate the restoration process.

Rivlin added that the incident provided a welcome distraction from the ongoing war in Gaza. “Well, he’s just a kid. So I think that somehow it touches the heart of the people in Israel and around the world,“ said Rivlin.

Roee Shafir, a restoration expert at the museum, said the repairs would be fairly simple, as the pieces were from a single, complete jar. Archaeologists often face the more daunting task of sifting through piles of shards from multiple objects and trying to piece them together.

Experts used 3D technology, hi-resolution videos, and special glue to painstakingly reconstruct the large jar.

Less than two weeks after it broke, the jar went back on display at the museum. The gluing process left small hairline cracks, and a few pieces are missing, but the jar’s impressive size remains.

The only noticeable difference in the exhibit was a new sign reading “please don’t touch.”

The Canadian Press. All rights reserved.

Source link

Continue Reading

Trending

Exit mobile version