The Latest Breaking News from Boulder

A Colorado wildfire south of Boulder that forced about 20,000 people to flee was listed at 21% contained by Sunday morning and most evacuation orders had been lifted

Boulder police say about 1,200 Colorado residents are being ordered to evacuate Saturday due to a fast-moving wildfire in the area of a destructive 2021 blaze

The Colorado college town of Boulder is marking the one-year anniversary of a shooting at a busy supermarket that killed 10 people with flowers and a public remembrance for those who died and those still grieving

BOULDER, Colorado - El doctor Warren Hern no tiene que imaginar lo que pudiera ocurrir a muchas mujeres en Estados Unidos si la Corte Suprema anula el caso Roe contra Wade.

BOULDER, Colo. — Dr. Warren Hern doesn't have to imagine what could befall many women in America if the Supreme Court strikes down Roe v. Wade.

The city of Boulder has had 18 puma reports in the last six weeks. In winter, the predator follows its prey to lower elevations.  

US scientists have measured Albert Einstein's theory of general relativity -- which holds that gravity slows time down -- at the smallest scale ever, demonstrating that clocks tick at different rates when separated by fractions of a millimeter. Jun Ye, of the National Institute of Standards and Technology (NIST) and…

Nearly a year after 10 people were shot and killed at a supermarket in Colorado, the redesigned store in the college town of Boulder is reopening Wednesday

LOS ANGELES — Federal prosecutors have charged a former UCLA lecturer with making criminal threats across state lines in connection with a video he sent students and faculty referencing a mass shooting, which in turn prompted a campus shutdown.

LOS ANGELES — To his students at UCLA, the warning signs about lecturer Matthew C. Harris seemed abundant and longstanding.

BOULDER, Colo. — When Matthew Harris moved into an apartment building across from the University of Colorado Boulder last year, some residents assumed he was a graduate student.