Why some Colorado research predicted the dwarf planet would be pockmarked, and a theory about why it’s not.

Galaxy NGC 1097 might not have a memorable name, but there's a huge black hole there gobbling up the matter around it.

The fastest spacecraft ever launched has traveled 3 billion miles to get a close-up look at the dwarf planet.

Carbon pricing and public education will make a difference, while divestment "doesn't do anything to remove a single ounce of CO2."

A small but growing number of investors are pulling their money from coal, oil, and gas to draw attention to climate change.

The storied telescope had a rocky start after it was launched into orbit in 1990, but has since revolutionized our understanding of space.

Colorado law says a business can’t deny services based on factors like race and sexual orientation. But some business owners want an exemption to follow their conscience.

Faster test results on genetic disorders can be a matter of life or death for some newborns. Colorado is working to get results faster.

The wild beasts will fill a Boeing 767 as part of a rescue effort. Organizers are calling it the largest airlift of its kind.

The Milky Way resides on the outskirts of a supercluster of galaxies that is 520 million light years across.

Billed as the successor to Hubble, the infrared telescope will search the farthest reaches of the universe using an optical system built in Boulder.

Driving under the influence of drugs or alcohol is a misdemeanor under current Colorado law, no matter how many prior convictions a driver has.

A similar move to outsource jobs by United resulted in major baggage headaches for holiday travelers at DIA. An aviation industry expert says outsourcing is the future.

A piano from Elton John’s hit recordings, the bed where John Lennon slept, and the original artwork from a Chicago album cover are among hundreds of items on the block.

As skiers head to the slopes for the Martin Luther King holiday, the state hopes a new management strategy will keep traffic moving.

Following a successful test of an engine that could send humans to the red planet, there's talk of building an extraterrestrial gas station.