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New Species of Giant Tyrannosaur Discovered in New Mexico | Sci.News

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New Species of Giant Tyrannosaur Discovered in New Mexico | Sci.News


The discovery of Tyrannosaurus mcraeensis, a sister species of the famous Tyrannosaurus rex, suggests that tyrannosaurid dinosaurs originated on Laramidia, an island continent that existed between 100 and 66 million years ago and stretched from modern-day Alaska to Mexico.

Life reconstruction of Tyrannosaurus mcraeen. Image credit: Sergey Krasovskiy.

“Tyrannosaurid dinosaurs were the dominant predators in North America and Asia during the Late Cretaceous epoch,” said Dr. Sebastian Dalman from the New Mexico Museum of Natural History and Science and his colleagues.

“Evolving from small-bodied ancestors in the mid-Cretaceous, they became apex predators in the latest Cretaceous, and finally saw the appearance of T. rex.”

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T. rex, characterized by a robust skeleton and powerful, bone-crushing jaws, was the dominant carnivore in the Late Maastrichtian of western North America.”

“Growing to 12 m long and 10 tons in weight, T. rex was the largest terrestrial predator of its time, and perhaps of all time.”

“Where and when Tyrannosaurini (T. rex and kin) originated remains unclear. Competing hypotheses place their origins in Asia, or western North America (Laramidia).”

The newly-identified species, Tyrannosaurus mcraeen, lived in what is now the United States between 71 and 73 million years ago, or between 5 and 7 million years before T. rex.

The dinosaur’s fossilized partial skull was found in the Hall Lake Formation of New Mexico.

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Although the specimen was initially assigned to T. rex and was comparable in size to those of T. rex, the paleontologists propose that it belongs to a new species due to the presence of multiple subtle differences in the shape of, and joins between, the skull bones of the specimen and T. rex.

An analysis of the relationships between Tyrannosaurus mcraeen and other theropod dinosaur species indicates that Tyrannosaurus mcraeen may have been a sister species to T. rex, making it the closest known relative of T. rex.

The authors suggest that Tyrannosaurini may have originated in southern Laramidia, an island continent that existed between 100 and 66 million years ago and stretched from modern-day Alaska to Mexico.

Additionally, they propose that Tyrannosaurini may have evolved a giant body size by approximately 72 million years ago, alongside other giant dinosaurs from southern Laramidia such as ceratopsians, hadrosaurs, and titanosaurs.

They speculate that the evolution of giant tyrannosaurins may have been driven by the giant body sizes of herbivores that they preyed on in southern Laramidia.

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“Evolution of giant tyrannosaurs in southern North America, alongside giant ceratopsians, hadrosaurs, and titanosaurs suggests large-bodied dinosaurs evolved at low latitudes in North America,” they said.

The study was published in the journal Scientific Reports.

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S.G. Dalman et al. 2023. A giant tyrannosaur from the Campanian–Maastrichtian of southern North America and the evolution of tyrannosaurid gigantism. Sci Rep 13, 22124; doi: 10.1038/s41598-023-47011-0

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New Mexico leaders push funding to fight screwworm after 1 local case

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New Mexico leaders push funding to fight screwworm after 1 local case


New Mexico leaders are backing a bipartisan bill after 12 confirmed U.S. screwworm cases, including one case in a Lea County dog.

SANTA FE, N.M. – New Mexico leaders are backing a bipartisan bill after 12 confirmed U.S. screwworm cases, including one case in a Lea County dog.

New Mexico State Veterinarian Dr. Samantha Holeck said the parasite has spread to New Mexico, though officials say they have not found any human cases.

“This is also not a political issue this is a nationwide issue that we all need to address because it affects all warm blooded animals including humans,” Holeck said.

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U.S. Reps. Gabe Vasquez and Teresa Leger Fernandez support the Protect America’s Herds Act.

The bill would create a grant program to train people to identify, treat, prevent and report screwworm. It would also support more livestock inspections and education for ranchers.

Rep. Teresa Leger Fernandez said she heard concerns from tribal leaders about the cost of protecting cattle herds.

“I spoke with one of our tribal leaders today and they have cattle operation and they’re worried, and they’re talking about how much more money they’re having to pay to go make sure they check on their herds and there are extra costs,” Leger Fernandez said.

Funding would prioritize states and tribal communities most at risk for screwworm outbreaks.

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State health officials said screwworm is not a food safety issue. They also said ranchers should stay alert but not alarmed.



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New Mexico Wants Almost $1B From ‘Public Nuisance’ Meta

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New Mexico Wants Almost B From ‘Public Nuisance’ Meta



New Mexico isn’t done with Meta yet. After the second phase of a landmark trial, the state is asking a judge to make the company pay almost $1 billion to address harm done to young people in New Mexico, SourceNM reports. In a court filing, attorneys with the New Mexico Department of Justice argue that Meta’s addictive design features and recommendation algorithms “substantially contributed to the increase and severity” of problems including depression and eating disorders. The state wants a judge to order Meta to pay $953 million into a fund for public education and behavioral health programs, reports Fox News.

  • After the first phase of the trial in March, a jury found the company endangered children and misled the public about its platforms’ safety. Meta was ordered to pay $375 million in damages, $5,000 for each violation.


New Mexico Attorney General Raúl Torrez has argued Meta executives prioritized profit over minors’ safety, ignored internal warnings, and misrepresented what they knew about harms to young users. In the second phase, First Judicial District Court Chief Judge Bryan Biedscheid heard arguments on whether the company’s actions created a public nuisance, the Santa Fe New Mexican reports. Final filings in that phase of the trial were submitted Friday. Beyond potential financial penalties, Biedscheid will also rule on the state’s request for Meta to make changes including stricter age controls and “safer algorithms” that “do not prioritize engagement over well being.”


Meta says New Mexico is overreaching, warning that the proposed mandates are “impractical and ill-considered” and “would risk leaving teens less safe, infringe on parental rights, and stifle free expression.” Meta argues that New Mexico hasn’t proven that its platforms affect mental health outcomes. In court filings, Meta has claimed that the state is seeking $3.7 billion, not $953 million, but Chief Deputy Attorney General James Grayson says the higher figure is an expert’s estimate of the cost to fund all child mental health interventions in the state. “We’re not trying to hold Meta responsible for mental health harms in general in New Mexico, only for what social media has cost,” Grayson tells the New Mexican.

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New Mexico

Rio Fire grows to 128 acres

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Rio Fire grows to 128 acres


Northern New Mexico Type 3 Team ordered


Santa Fe, NM, June 17, 2026
—The Rio Fire located in the Espanola Ranger District on Mesa De La Gallina three miles northeast of Chicoma Mountain has grown to 128 acres. Red flag conditions, heavy dead-and-down fuels and limited safe access to the fire contributed to the fire’s growth. Today, crews focused on building safe access to suppress the fire. Additional personnel have been ordered including a Type 1 Interagency Handcrew (hotshot crew), Rapid Extraction Module, and a short haul capable helicopter. Aerial resources such as the Type 1 helicopter and air tankers have been working all day on the fire dropping water and retardant to reduce fire growth. Two large air tankers have been ordered to the fire in addition to scooper planes. Values at risk include private property inholdings north of the fire. Smoke from the Rio Fire may be visible from Santa Fe, Los Alamos, Espanola and the surrounding communities.

Due to the complexity of the fire the Northern New Mexico Type 3 Incident Management Team has been ordered to take command of the fire. The team will in brief with the Santa Fe National Forest at 10:00 am tomorrow.

Fire information is available on the Santa Fe National Forest website, Inciweb, NM Fire Information, and social media pages (Facebook and X).

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About the Forest Service: The Forest Service has brought people and communities together to answer the call of conservation for more than 100 years. Grounded in world-class science and technology — and rooted in communities — the Forest Service connects people to nature and recreation opportunities. The agency manages 193 million acres of public land, supports the nation’s forest industry and energy needs, and operates the largest and most respected wildland fire and forestry research organizations in the world. By providing assistance to state and private landowners and working with tribes and other partners, the Forest Service also helps steward an additional 900 million forested acres within the U.S.



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