On Sunday, the chatbot was updated to "not shy away from making claims which are politically incorrect, as long as they are well substantiated." By Tuesday, it was praising Hitler.

Yaccarino, a traditional business executive, was in many ways a strong foil to the mercurial and controversy-courting Musk. She did not cite a reason for her departure.

There was little warning when floodwater from Guadalupe River surged through central Texas last week, killing over 100 people.

Europe recently downgraded the protected status of wolves, sparking concern among conservationists who warn this may undo decades of progress and lead to the species becoming threatened again.

College teams are showing off their innovations in solar car technology this week at a race in Bowling Green, Kentucky.

Marine mammal researchers are investigating how sea lions were affected by the longest toxic algal bloom on record off the coast of Southern California. Some sea lions are being released back into the wild.

The concepts in the MingKwai typewriter underlie how Chinese, Japanese and Korean are typed today. The typewriter, patented in 1946, was found last year in an upstate New York basement.

The team from NPR's "Planet Money" looks at Elon Musk's Starlink and its big lead in the satellite internet market. Can it stay ahead of its competitors?

More than 70 writers wrote an open letter outlining their issues with the use of A.I. in the literary world. Their main demand is for publishing houses to never release books created by machines.

The newly discovered interstellar visitor is just the third of its kind and fascinates astronomers who hope to learn from it about galaxies far, far away.