Scientists say they've solved debate about origins of mysterious dinosaur
The discovery "rewrites decades of research on Earth's most famous predator," the study's co-author said.
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The discovery "rewrites decades of research on Earth's most famous predator," the study's co-author said.
Apex predators, like the Tyrannosaurus rex, eventually arose from smaller-bodied tyrannosauroid dinosaurs called Khankhuuluu mongoliensis, the study's researchers said.
The researchers determined it predated T. rex by up to 7 million years, showing that tyrannosaurs were in North America long before paleontologists previously thought.
The 200-pound skull fossil, nicknamed Maximus, is being sold by an owner who wishes to remain anonymous, the auction house said.
Rare prehistoric dinosaur footprints discovered in the UK have shed new light on the middle Jurassic period, according to a new report.
The rare Triceratops fossil found at a construction site in Thornton has a name: Tiny. Students at Brantner Elementary School named the 66-million-year old dinosaur.
It was nearing the end of summer when a construction site inspector noticed something out of the corner of his eye no bigger than a quarter that turned out to be something much bigger.
Even more dinosaur bones have surfaced at the dig for Triceratops in Thornton. This is the latest in a series of fossil discoveries at the site in the past month.
More Triceratops fossils were found Monday at the site of the big triceratops discovery last month in Thornton.
The digging continues at the site of the big triceratops discovery in Thornton, and this week evidence of another dinosaur was found.
The Denver Broncos promised there would be a few tricks and treats at Sunday's home game at the Chargers, and one of the best of those came from a cheerleader.
Dinosaur Ridge in Morrison have uncovered more mysteries about dinosaurs, particularly how they mate.
Denver's Board of Ethics voted unanimously to investigate two complaints against City Attorney Miko Brown.
Authorities are investigating a recent theft that caused about $10,000 in damage at a city park in Colorado.
Murder suspect Barry Morphew is facing charges in connection with an alleged hit-and-run in Denver.
An 18-year-old is facing multiple charges in a shooting northwest of Denver that left a young woman injured.
An injured climber was rescued Monday after a fall while descending Crestone Needle.
Denver's Board of Ethics voted unanimously to investigate two complaints against City Attorney Miko Brown.
Authorities are investigating a recent theft that caused about $10,000 in damage at a city park in Colorado.
Murder suspect Barry Morphew is facing charges in connection with an alleged hit-and-run in Denver.
An 18-year-old is facing multiple charges in a shooting northwest of Denver that left a young woman injured.
An injured climber was rescued Monday after a fall while descending Crestone Needle.
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A new Flight for Life helicopter was unveiled at CommonSpirit in Lakewood and the eye-catching pink will be sure to get attention.
Two Aurora police officers were involved in a crash and the suspect was arrested on Tuesday.
A driver is facing charges after a deadly crash that closed Mainstreet in Parker early Wednesday morning.
The community gathered to rally for charges to be dropped after four were arrested during an ICE protest earlier this summer.
Ben Shelton ended Carlos Alcaraz's title reign in the latest-finishing match in U.S. Open history, pulling out the victory in a marathon tussle that ended at 3:33 a.m. Wednesday.
The Broncos are highlighting their stadium's new food and drink options for their upcoming 2026 season.
The Border War between Colorado State University and the University of Wyoming returns this weekend, continuing one of the oldest rivalries in college football.
At the U.S. Open, artificial intelligence is giving players and fans a new way to experience the tournament.
Playing together at the U.S. Open in New York for the first time in four years, Serena and Venus Williams lost in a three-set thriller match in the first round of the women's doubles tournament.
Wall Street analysts are skeptical that the Treasury Department's bond purchases can curb yields and lower U.S. borrowing costs.
The TSA is not prepared to eliminate all liquid restrictions, and the existing rule limiting other carry-on liquids to 3.4 ounces remains in effect.
Apple introduced the iPhone 18 at its annual tech showcase and unveiled its first foldable phone.
Dolly Parton died in Nashville on Aug. 25 at the age of 80 — a shock to fans around the world who weren't aware of her illness.
A White House spokesperson said in a statement on Wednesday that Mr. Trump "has a longstanding practice of giving Christmas gifts to people in his orbit."
A White House spokesperson said in a statement on Wednesday that Mr. Trump "has a longstanding practice of giving Christmas gifts to people in his orbit."
The Trump administration moved Tuesday to ban imports of Canadian motorcycles, some dairy products and most types of alcohol starting later this month, intensifying the trade war between the two countries.
The Trump administration asked the Supreme Court to intervene in a lawsuit over the use of a controversial data system to review state voter rolls.
Historian Lonnie Bunch will leave his position as secretary of the Smithsonian at the end of the year, he announced Tuesday.
Canada's steep retaliatory tariffs on $20 billion in U.S. goods took effect just after midnight ET on Tuesday, deepening the trade war between the two countries.
Employer health benefit costs are projected to see the steepest increase next year since 2003. That could mean higher deductions and out-of-pocket costs for workers.
Arapahoe County Public Health has invested money to support moms and families through a bilingual doula program. Doulas are trained to give support before, during and after birth.
Lindsay Clancy's case is resonating with moms across the U.S. — bringing into focus the spectrum of perinatal mood and anxiety disorders and the lack of resources for many women.
Clean air advocates are asking local and state leaders in Colorado to act on the unhealthy ozone levels and their impacts.
If passed, the legislation would expand eligibility for residents in 57 Colorado zip codes to get compensation based on a list of eligible diseases and cancers, and would include coverage for workers and residents known as "downwinders."
Wall Street analysts are skeptical that the Treasury Department's bond purchases can curb yields and lower U.S. borrowing costs.
Apple introduced the iPhone 18 at its annual tech showcase and unveiled its first foldable phone.
A top Anthropic researcher says there's more than a 10% chance AI "could kill all humans," after a colleague resigned over similar concerns.
Beer delivery trucks are repeatedly turning onto a residential cul-de-sac in a Northern Colorado neighborhood.
The Trump administration moved Tuesday to ban imports of Canadian motorcycles, some dairy products and most types of alcohol starting later this month, intensifying the trade war between the two countries.
Denver's Board of Ethics voted unanimously to investigate two complaints against City Attorney Miko Brown.
A former student and her parents are suing a church and school, alleging officials failed to protect the girl from a music director who they say sexually assaulted her when she was 13 and then failed to properly respond when concerns surfaced.
Despite having health insurance, families in Colorado have been hit with massive medical bills after their babies spent time in NICUs.
Denver Mayor Mike Johnston's security detail drew his gun on a man at Union Station last week, the mayor's office said Monday.
Denver City Attorney Faces Second Ethics Complaint, This One Over DIA Legal Work