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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 confirms latest measles case at a local jail

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New Mexico confirms latest measles case at a local jail


The number of confirmed measles cases in New Mexico increased to six after the state’s Department of Health confirmed Wednesday a new case inside a local jail in Las Cruces.

A federal inmate being held in the Doña Ana County Detention Center is the latest person to have tested positive for measles. The New Mexico Department of Health said others may have been exposed to the highly contagious disease from this confirmed case if they visited the U.S. District Court building in Las Cruces on Feb. 24.

State heath officials are now urging anyone who was at the courthouse that day to check their vaccination status and report any measles symptoms from now until March 17 to a health care provider.

“The New Mexico Department of Health continues to urge people to get the measles, mumps and rubella (MMR) vaccination,” Dr. Chad Smelser, New Mexico’s deputy state epidemiologist, said in a statement. “Vaccine is the best tool to protect you from measles.”

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Measles spreads through the air and people who contract the virus may experience symptoms such as runny nose, fever, cough, red eyes and a distinctive blotchy rash. These symptoms can develop between one and three weeks after exposure.

All of the six confirmed measles cases in New Mexico so far are federal detainees.

The first measles case was detected in the Hidalgo County Detention Center on Feb. 25, when a detainee, whose vaccination status was unknown, tested positive for the disease by the New Mexico Department of Health’s Scientific Laboratory.

Two days later, a second federal inmate in the same jail tested positive for the virus alongside two detainees in the Luna County Detention Center and another in the Doña Ana County Detention Center.

Both the Luna County and Doña Ana detention centers are local jails that also serve as holding facilities for federal immigration enforcement.

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New Mexico health officials said they are the state’s first confirmed cases of this year, following a statewide outbreak in 2025 that sickened 100 people from mid-February to mid-September.

With two measles cases reported on each of the three local jails, Smelser said that the New Mexico Department of Health has sent vaccination teams to all three facilities.

State health officials are also “coordinating with all the facilities to assure all quarantine, isolation, testing and vaccination protocols are followed to minimize risk of measles spread.”

According to the NBC News measles tracker, more than 1,000 cases have been counted nationwide just in the first two months of this year. That’s nearly half the amount of cases confirmed in the United States in all of last year.

As 2026 already stands as one of the three worst years for measles infections in the country since 2000, another measles outbreak was confirmed this week in Texas inside the nation’s largest immigration detention facility.

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On Wednesday, an Immigration and Customs Enforcement spokesperson told NBC News that a least 14 cases of measles were confirmed inside Camp East Montana, which is located on the Fort Bliss Army base in El Paso.

The people who tested positive for measles have been “cohorted and separated from the rest of the detained population to prevent further spread,” the ICE spokesperson said.



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New Mexico legislation focusing on K-3 math education aims to improve stubbornly low scores

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New Mexico legislation focusing on K-3 math education aims to improve stubbornly low scores


Aaron Jawson regularly spends time reteaching the basics to his sixth grade math students.

They often have a bit of a complex around math, said Jawson, who teaches at Ortiz Middle School. They often have a lot going on at home, or a lot of stress about societal problems.

And in many cases they have been behind for years.

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The problem

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Why K-3?

Teacher preparation







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Jesus Dominguez ponders the next step in an equation during Aaron Jawson’s sixth grade math class Monday at Ortiz Middle School.

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Family involvement

Other changes







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Jesus Dominguez ponders the next step in an equation during Aaron Jawson’s sixth grade math class Monday at Ortiz Middle School.


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What more could be done?

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Retired Wright-Patterson general mentioned in UFO report missing in NM

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Retired Wright-Patterson general mentioned in UFO report missing in NM


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  • A retired U.S. Air Force general, Maj. Gen. William Neil McCasland, has been reported missing in New Mexico.
  • McCasland formerly commanded the Air Force Research Laboratory at Wright-Patterson Air Force Base in Ohio.
  • His name was mentioned in a 2016 WikiLeaks email release in connection to UFO research.

A retired U.S. Air Force general who once commanded a research division at Wright-Patterson Air Force Base near Dayton, Ohio, has gone missing in New Mexico.

This is what we know.

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McCasland commanded Air Force Research Laboratory at Wright-Patterson Air Force Base

The Bernalillo County Sheriff’s Office has issued a Silver Alert for Maj. Gen. William Neil McCasland, 68, who has been missing since last week, Newsweek reports. He was last seen on Feb. 27 in Albuquerque. McCasland is 5 feet 11 inches tall and weighs about 160 pounds. He has white hair and blue eyes, and he has unspecified medical issues, per the sheriff’s office, which is worried about his safety.

McCasland was the commander of the Air Force Research Laboratory at Wright-Patterson Air Force Base near Dayton, according to his Air Force biography. He managed a $2.2 billion science and technology program as well as $2.2 billion in additional customer-funded research and development. He joined Wright-Patterson in 2011 and retired in 2013.

He was commissioned in 1979 after graduating from the U.S. Air Force Academy with a Bachelor of Science degree in astronautical engineering. He has served in a wide variety of space research, acquisition and operations roles within the Air Force and the National Reconnaissance Office.

McCasland mentioned in WikiLeaks release in connection to UFOs

McCasland was described as a key adviser on UFO-related projects by Tom DeLonge, UFO researcher and guitarist for Blink-182, Newsweek reports. The general’s name appears in the 2016 WikiLeaks email release from John Podesta, then Hillary Clinton’s campaign manager.

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In emails to Podesta, DeLonge said he’s been working with McCasland for months and that the general was aware of the materials DeLonge was probing because McCasland has been “in charge of the laboratory at Wright‑Patterson Air Force Base where the Roswell wreckage was shipped,” per Newsweek.

However, there is no official record of DeLonge’s claims, and McCasland has neither confirmed nor denied it.

Wright-Patterson Air Force Base home to UFO project

The Dayton Air Force base was home to Project Blue Book in the 1950s and 60s, according to “The Air Force Investigation into UFOs” published by Ohio State University.

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During that time, it logged some 12,618 UFO sightings, with 701 of those remaining “unidentified.” The U.S. government created the project because of Cold War-era security concerns and Americans’ obsession with aliens.



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