* . *
  • About
  • Advertise
  • Privacy & Policy
  • Contact
Sunday, June 22, 2025
Earth-News
  • Home
  • Business
  • Entertainment
    Netflix unveils Dallas immersive venue for fans of hit shows like ‘Squid Game,’ ‘Stranger Things’ – Houston Chronicle

    Step Inside Netflix’s New Dallas Immersive Experience Featuring Hits Like ‘Squid Game’ and ‘Stranger Things

    ‘Puttin’ on the Ritz’: Civic Players bring ‘Young Frankenstein’ to life – Yahoo

    Civic Players Deliver a Hilarious and Unforgettable Performance of ‘Young Frankenstein

    ‘Wheel of Fortune’: Amputee Wins $60,000 After Breaking Incredible ‘Curse’ – Hastings Tribune

    Wheel of Fortune’ Amputee Breaks Incredible ‘Curse’ to Win $60,000!

    North Star Sports & Entertainment Network: Coming soon – KTTC News

    North Star Sports & Entertainment Network: Coming soon – KTTC News

    Safety concerns in Deep Ellum create apprehension as the entertainment district gains visitors – CBS News

    Safety Concerns Surge Amid Deep Ellum’s Booming Popularity and Growing Crowds

    Elisabeth Moss’ ‘Handmaid’s Tale’ Emmy chances, by the numbers – Yahoo

    Elisabeth Moss’ ‘Handmaid’s Tale’ Emmy chances, by the numbers – Yahoo

  • General
  • Health
  • News

    Cracking the Code: Why China’s Economic Challenges Aren’t Shaking Markets, Unlike America’s” – Bloomberg

    Trump’s Narrow Window to Spread the Truth About Harris

    Trump’s Narrow Window to Spread the Truth About Harris

    Israel-Gaza war live updates: Hamas leader Ismail Haniyeh assassinated in Iran, group says

    Israel-Gaza war live updates: Hamas leader Ismail Haniyeh assassinated in Iran, group says

    PAP Boss to Niger Delta Youths, Stay Away from the Protest

    PAP Boss to Niger Delta Youths, Stay Away from the Protest

    Court Restricts Protests In Lagos To Freedom, Peace Park

    Court Restricts Protests In Lagos To Freedom, Peace Park

    Fans React to Jazz Jennings’ Inspiring Weight Loss Journey

    Fans React to Jazz Jennings’ Inspiring Weight Loss Journey

    Trending Tags

    • Trump Inauguration
    • United Stated
    • White House
    • Market Stories
    • Election Results
  • Science
  • Sports
  • Technology
    Technology Convergence Report 2025 – The World Economic Forum

    Technology Convergence Report 2025 – The World Economic Forum

    How AI can help make cities work better for residents – MIT Technology Review

    How AI can help make cities work better for residents – MIT Technology Review

    Tech Champions with Leo Bletnitsky of Healthy Technology Solutions – Buzz Media Group

    Meet Tech Champion Leo Bletnitsky of Healthy Technology Solutions

    Crypto’s true revolution is about humanity, not technology – Cointelegraph

    Crypto’s Real Revolution: Transforming Humanity Beyond Technology

    $1 Billion Problem: New Technology Could Save Your Daily Cup of Coffee – SciTechDaily

    The $1 Billion Challenge: How New Technology Could Rescue Your Daily Cup of Coffee

    Canada’s construction industry gets serious about investing in technology as pressure mounts to do more with less – Yahoo Finance

    Canada’s Construction Industry Accelerates Tech Investments to Overcome Growing Challenges and Boost Efficiency

    Trending Tags

    • Nintendo Switch
    • CES 2017
    • Playstation 4 Pro
    • Mark Zuckerberg
No Result
View All Result
  • Home
  • Business
  • Entertainment
    Netflix unveils Dallas immersive venue for fans of hit shows like ‘Squid Game,’ ‘Stranger Things’ – Houston Chronicle

    Step Inside Netflix’s New Dallas Immersive Experience Featuring Hits Like ‘Squid Game’ and ‘Stranger Things

    ‘Puttin’ on the Ritz’: Civic Players bring ‘Young Frankenstein’ to life – Yahoo

    Civic Players Deliver a Hilarious and Unforgettable Performance of ‘Young Frankenstein

    ‘Wheel of Fortune’: Amputee Wins $60,000 After Breaking Incredible ‘Curse’ – Hastings Tribune

    Wheel of Fortune’ Amputee Breaks Incredible ‘Curse’ to Win $60,000!

    North Star Sports & Entertainment Network: Coming soon – KTTC News

    North Star Sports & Entertainment Network: Coming soon – KTTC News

    Safety concerns in Deep Ellum create apprehension as the entertainment district gains visitors – CBS News

    Safety Concerns Surge Amid Deep Ellum’s Booming Popularity and Growing Crowds

    Elisabeth Moss’ ‘Handmaid’s Tale’ Emmy chances, by the numbers – Yahoo

    Elisabeth Moss’ ‘Handmaid’s Tale’ Emmy chances, by the numbers – Yahoo

  • General
  • Health
  • News

    Cracking the Code: Why China’s Economic Challenges Aren’t Shaking Markets, Unlike America’s” – Bloomberg

    Trump’s Narrow Window to Spread the Truth About Harris

    Trump’s Narrow Window to Spread the Truth About Harris

    Israel-Gaza war live updates: Hamas leader Ismail Haniyeh assassinated in Iran, group says

    Israel-Gaza war live updates: Hamas leader Ismail Haniyeh assassinated in Iran, group says

    PAP Boss to Niger Delta Youths, Stay Away from the Protest

    PAP Boss to Niger Delta Youths, Stay Away from the Protest

    Court Restricts Protests In Lagos To Freedom, Peace Park

    Court Restricts Protests In Lagos To Freedom, Peace Park

    Fans React to Jazz Jennings’ Inspiring Weight Loss Journey

    Fans React to Jazz Jennings’ Inspiring Weight Loss Journey

    Trending Tags

    • Trump Inauguration
    • United Stated
    • White House
    • Market Stories
    • Election Results
  • Science
  • Sports
  • Technology
    Technology Convergence Report 2025 – The World Economic Forum

    Technology Convergence Report 2025 – The World Economic Forum

    How AI can help make cities work better for residents – MIT Technology Review

    How AI can help make cities work better for residents – MIT Technology Review

    Tech Champions with Leo Bletnitsky of Healthy Technology Solutions – Buzz Media Group

    Meet Tech Champion Leo Bletnitsky of Healthy Technology Solutions

    Crypto’s true revolution is about humanity, not technology – Cointelegraph

    Crypto’s Real Revolution: Transforming Humanity Beyond Technology

    $1 Billion Problem: New Technology Could Save Your Daily Cup of Coffee – SciTechDaily

    The $1 Billion Challenge: How New Technology Could Rescue Your Daily Cup of Coffee

    Canada’s construction industry gets serious about investing in technology as pressure mounts to do more with less – Yahoo Finance

    Canada’s Construction Industry Accelerates Tech Investments to Overcome Growing Challenges and Boost Efficiency

    Trending Tags

    • Nintendo Switch
    • CES 2017
    • Playstation 4 Pro
    • Mark Zuckerberg
No Result
View All Result
Earth-News
No Result
View All Result
Home Science

Tiny T. rex fossils may be distinct species – but not everyone agrees

January 3, 2024
in Science
Tiny T. rex fossils may be distinct species – but not everyone agrees
Share on FacebookShare on Twitter

Life

Palaeontologists can’t agree on whether fossils from several small dinosaurs represent juvenile Tyrannosaurus rex or smaller adults of a separate species that lived alongside them

By James Dinneen

Illustration of a Nanotyrannus fighting with a young Tyrannosaurus rex

Raul Martin

Tyrannosaurus rex may not have been the only large carnivore reigning over North America during the Late Cretaceous after all. A reinterpretation of several fossils of small dinosaurs sometimes categorised as young T. rex adds weight to the controversial idea that another smaller species, called Nanotyrannus lancensis, lived alongside the king of the dinosaurs.

“This is the most famous fossil animal in the world,” says Nicholas Longrich at the University of Bath in the UK. “There are a lot of people looking at it. And we can’t agree.”

The debate has divided palaeontologists for decades. A 1960s paper argued that a skull unearthed two decades earlier in Montana’s Hell Creek Formation was from a T. rex that had died before reaching full maturity. But in the 1980s, others argued that differences between the skull and known T. rex specimens showed this fossil was in fact an adult of a distinct species, which they named Nanotyrannus lancensis.

More recent work based on additional fossils disputed this, arguing that the variation between the smaller fossils and full-size T. rex fossils were differences of age, not of species. The debate has implications for making sense of the ecology and diversity of dinosaurs in the period just before they went extinct.

Now, Longrich and Evan Saitta at the University of Chicago have brought together six lines of evidence in favour of identifying the smaller fossils as Nanotyrranus. This included cataloguing more than 150 discrete characteristics that differ between the fossils at issue and known T. rex fossils, including things like a narrower snout and smoother teeth. They argue it would be implausible for all of these to change between a juvenile and an adult T. rex.

The researchers also analysed patterns of growth rings in bones, which form as bones pause their growth each year. As an animal’s growth slows, the distance between the rings shrinks. The researchers found a tightening of these rings, which they say suggests the smaller fossils are young adult Nanotyrannus rather than juvenile T. rex. They estimate these adult Nanotyrannus would have weighed between 1000 to 2000 kilograms, up to a quarter of an adult T. rex’s 8000 kilograms. “Any way you graph that data you can’t get that animal to turn into a T. rex,” says Longrich.

The newest piece of evidence is a front-bone fossil – which sits between the eye and skull – that Longrich unearthed from an archive at the University of California Museum of Paleontology, which the researchers interpret as a juvenile T. rex because it differs in critical ways from the hypothesised Nanotyrannus fossils. “It’s an animal that’s smaller than the Nanotyrannus but it’s got the T. rex morphology,” says Longrich.

Some outside researchers say they remain unconvinced that the smaller fossils are indeed a separate species. “I have no problem with Nanotyrannus being a real thing if science shows that,” says Holly Woodward at Oklahoma State University, who authored a 2020 study of growth rings that pointed to the juvenile T. rex explanation. “I’m not convinced that their interpretation is more accurate than ours,” she says, adding that a specimen of a fully-grown Nanotyrannus would be needed to resolve the different interpretations.

Thomas Carr at Carthage College in Wisconsin, who has long argued that the fossils are juvenile T. rex, adds that the front-bone found in Berkeley is too incomplete to sway him. “I don’t take this seriously at all,” he says.

Scott Persons at the College of Charleston in South Carolina is more welcoming of what he says is a new perspective on a long-stagnant divide among palaeontologists. “This new paper will not resolve the debate, but I am optimistic that this paper will shake things up a great deal,” he says.

Topics:

>>> Read full article>>>
Copyright for syndicated content belongs to the linked Source : New Scientist – https://www.newscientist.com/article/2410573-tiny-t-rex-fossils-may-be-distinct-species-but-not-everyone-agrees/?utm_campaign=RSS%7CNSNS&utm_source=NSNS&utm_medium=RSS&utm_content=home

Tags: Distinctfossilsscience
Previous Post

Explainer-What Other Health Conditions Might Weight-loss Drugs Treat?

Next Post

Matabele Ants Use Antimicrobial Compounds to Treat Infected Wounds, Study Shows

Technology Convergence Report 2025 – The World Economic Forum

Technology Convergence Report 2025 – The World Economic Forum

June 22, 2025
Kingsley Coman reveals desire to stay at Bayern Munich – Yahoo Sports

Kingsley Coman reveals desire to stay at Bayern Munich – Yahoo Sports

June 22, 2025
What role will Pope Leo XIV play in the future of Laudato Si’ ecological action? – National Catholic Reporter

What role will Pope Leo XIV play in the future of Laudato Si’ ecological action? – National Catholic Reporter

June 22, 2025
Opinion: What if MAGA Has a Point About Science? – Undark Magazine

What If MAGA Is Right About Science?

June 22, 2025
Are We Ready To Redefine the Second? Scientists Just Took a Major Step – SciTechDaily

Are We Ready to Redefine the Second? Scientists Achieve a Groundbreaking Breakthrough

June 22, 2025
What’s your ‘biological age’? And here’s how to lower it… – BreakingNews.ie

What’s your ‘biological age’? And here’s how to lower it… – BreakingNews.ie

June 22, 2025
Club World Cup trophy won’t make up for last season – Guardiola – BBC

Guardiola: Club World Cup Trophy Can’t Erase Last Season’s Disappointment

June 22, 2025
Russia’s Economy Minister Warns of Looming Recession – The Moscow Times

Russia’s Economy Minister Warns of an Imminent Recession

June 22, 2025
Governor Ferguson appoints a new director for the Health Care Authority – KIMA

Governor Ferguson Appoints Dynamic New Leader to Head Health Care Authority

June 22, 2025
‘Sleeping giant’: Jewish Voters Unite pushes NY Jews to flex political power – JNS.org

Sleeping Giant Awakens: How Jewish Voters Are Uniting to Flex Political Power in New York

June 22, 2025

Categories

Archives

June 2025
MTWTFSS
 1
2345678
9101112131415
16171819202122
23242526272829
30 
« May    
Earth-News.info

The Earth News is an independent English-language daily published Website from all around the World News

Browse by Category

  • Business (20,132)
  • Ecology (697)
  • Economy (711)
  • Entertainment (21,611)
  • General (15,511)
  • Health (9,752)
  • Lifestyle (716)
  • News (22,149)
  • People (714)
  • Politics (718)
  • Science (15,930)
  • Sports (21,208)
  • Technology (15,697)
  • World (691)

Recent News

Technology Convergence Report 2025 – The World Economic Forum

Technology Convergence Report 2025 – The World Economic Forum

June 22, 2025
Kingsley Coman reveals desire to stay at Bayern Munich – Yahoo Sports

Kingsley Coman reveals desire to stay at Bayern Munich – Yahoo Sports

June 22, 2025
  • About
  • Advertise
  • Privacy & Policy
  • Contact

© 2023 earth-news.info

No Result
View All Result

© 2023 earth-news.info

No Result
View All Result

© 2023 earth-news.info

Go to mobile version