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.
A former school security guard in Jefferson County is facing multiple charges of sexual exploitation of a child.
Several rounds of wildfire smoke will move across Colorado this week, bringing hazy skies, reduced visibility and periods of poor air quality.
A California-based junior bugle corps on tour came to a stop on Monday when their bus caught fire on I-25 in Northern Colorado.
Colorado State Patrol is investigating after a semi-truck hauling cars rolled over on I-25 on Monday afternoon.
The Aurora City Council is considering a measure that could change how the city handles some problem landlords and rundown rental properties, following months of growing frustration over a broken code enforcement system.
A former school security guard in Jefferson County is facing multiple charges of sexual exploitation of a child.
Several rounds of wildfire smoke will move across Colorado this week, bringing hazy skies, reduced visibility and periods of poor air quality.
A California-based junior bugle corps on tour came to a stop on Monday when their bus caught fire on I-25 in Northern Colorado.
Colorado State Patrol is investigating after a semi-truck hauling cars rolled over on I-25 on Monday afternoon.
The Aurora City Council is considering a measure that could change how the city handles some problem landlords and rundown rental properties, following months of growing frustration over a broken code enforcement system.
A former school security guard in Jeffco Public Schools is facing multiple charges of sexual exploitation of a child.
Apex Park was temporarily closed on Monday to protect visitors while Colorado Parks and Wildlife officers monitored conditions.
The Aurora City Council is considering a measure that could change how the city handles some problem landlords and rundown rental properties, following months of growing frustration over a broken code enforcement system.
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On Monday, service and polling centers opened to serve voters across Colorado.
CBS Colorado's Eric Christensen never thought his golf addiction would take him to Roggen, Colorado. But last month he made the trek to a semi-ghost town that's the home of Rodeo Dunes.
Wyndham Clark began the final round up six shots, but ended up winning by just one, securing his second U.S. Open title in four years.
Serena Williams recently returned to competition in doubles after nearly four years away from professional tennis.
In front of a roaring Seattle crowd, the U.S. men's soccer team on Friday defeated Australia in its second World Cup match, clinching a spot in the Round of 32 in the process.
Assistant Coach of the Colorado Eagles, Kim Weiss, is headed to Las Vegas after accepting a head coach position for a new Professional Women's Hockey League team.
The 21st Century ROAD to Housing Act, which has rare bipartisan support, would make it harder for major investors to hoard homes.
U.S. District Judge Sparkle Sooknanan said the administration violated the law when it created a centralized database of Americans' personal records.
Exactly where the comet 3I/ATLAS came from within the Milky Way remains a mystery.
U.K. Prime Minister Keir Starmer is resigning, and the man widely expected to replace him is a fellow Labour Party lawmaker known as the "King of the North."
Clive Davis helped shape the careers of music stars including Janis Joplin, Bruce Springsteen and Whitney Houston.
The 21st Century ROAD to Housing Act, which has rare bipartisan support, would make it harder for major investors to hoard homes.
U.S. District Judge Sparkle Sooknanan said the administration violated the law when it created a centralized database of Americans' personal records.
On Monday, June 22, service and polling centers will open to serve voters across Colorado.
A Trump administration plan would charge legal immigrants seeking citizenship $570 more in application fees while eliminating waivers and fee reductions for low-income applicants.
Alan Greenspan's lengthy reign at the Federal Reserve coincided with a period of stability from the mid-1980s until 2007.
A pilot program at UCHealth University of Colorado Hospital is using robotic animals to bring joy and connection to patients with dementia.
A popular brand creator personally knows what the NICU experience is like, so he stopped by to offer families support.
Dozens of service members at Lackland Air Force Base in Texas have fallen ill with the flu in the weeks since Defense Secretary Pete Hegseth rescinded the vaccine mandate, sources familiar confirmed to CBS News.
Gallup found that only 49% of Americans were "cost-secure" last year, with concerns about medical bills and prescription costs rising across income groups.
An estimated hundreds of thousands of children, many of them U.S. citizens, have been separated from a parent in the Trump administration's immigration crackdown.
Changes are coming to the University of Colorado Denver after the school purchased a high-rise in the Central Business District, creating opportunities to expand students' career and research experiences.
The 21st Century ROAD to Housing Act, which has rare bipartisan support, would make it harder for major investors to hoard homes.
Faster income growth for top U.S. earners has eroded Social Security's tax base, fueling calls to raise or eliminate the payroll tax cap.
On Tuesday, the Erie Town Council is set to vote for a second time on whether to sell the town's remaining mineral rights tied to a major oil and gas project that would stretch from Weld County into Boulder County.
Alan Greenspan's lengthy reign at the Federal Reserve coincided with a period of stability from the mid-1980s until 2007.
The Colorado State Patrol has concluded one of its troopers, Amber Garcia, used excessive force when she tasered a driver seven times in 35 seconds in 2024 in Saguache County.
Magnus' Law is named after a 17-year-old boy killed by a driver who was never investigated for DUI. But the driver had been drinking.
Most parents assume they get to choose which health insurance plan covers their newborn. For one family, that wasn't the case.
Colorado's legal marijuana industry was built on a promise: strict regulation would protect businesses and consumers, while tax revenue would support schools, roads and public programs. But one of the state's largest cannabis cultivators says that promise is beginning to break down.
Brandin Kreuzer, the man whose 50-year prison sentence for shooting a sheriff's deputy was commuted by Colorado's governor, says he is ashamed of the violence he committed as a 19-year-old.