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A recently discovered green comet is passing by Earth for the first time in 50,000 years.

COVID-19 symptoms like strokes and kidney damage are unusual for a respiratory disease. Researchers are looking into how the coronavirus damages blood vessels and what that means for treatment.

Chile has been praised worldwide for its COVID-19 vaccination program, inoculating a higher proportion of its population than all but two countries. Yet Chile's battle against the pandemic isn't over.

The U.S. men's hockey team capped a disappointing Winter Olympics by losing a quarterfinal match to Finland with a score of 4-3. The American team never gelled, winning only once in six games.

The PyeongChang 2018 Olympics will be the first Winter Olympics to feature figure skaters performing to music with lyrics.

The Mid-Autumn Festival began Thursday in China and around the world. People celebrate the harvest moon by eating mooncakes and lighting lanterns. NPR discusses the symbolism behind the mooncake.

The federal government's top climate scientists announced Tuesday that 2012 was really hot — among the top 10 hottest years on record and the hottest ever in the U.S., with rising sea levels, less Arctic sea ice and warmer oceans. And the American Geophysical Union called humanity "the major influence" on global climate change.

Five stories that have North Texas talking: The number of minority-owned businesses in D-FW exceeds the national rate; a century ago, Bevo didn’t get any…

The distance marks a record: the farthest from Earth an image has been taken. Before NASA's New Horizons probe caught these glimpses in December, the 1990 "Pale Blue Dot" image had held the record.

More than 40 researchers concluded that climate change would make ecosystems such as deciduous forests, grasslands and Arctic tundra unrecognizable.