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Twitter headquarters is shown in San Francisco on Nov. 4, 2022.

Elon Musk relaunches Twitter Blue, the subscription that includes check marks

The social media company also disbanded its outside council of civil and human rights advisors, exacerbating concerns about what it's doing to protect users.

Computers have been used in rocketry for half-a-century, so it's possible to think that the new AI programs could help. They struggled to grasp the basics.

We asked the new AI to do some simple rocket science. It crashed and burned

Computers traditionally excel at rocketry, so why do new artificial intelligence programs get it wrong?

David Harbour plays Santa in "Violent Night."

'Violent Night' wishes you season's beatings in R-rated action comedy

Actor David Harbour talks about playing Santa.

Cyclists and pedestrians enjoy Rock Creek Park's Beach Drive in Washington, D.C., on Nov. 26. The road has been closed to motorized vehicles since April 2020, and officials have decided to keep it closed to vehicles indefinitely.

Some streets closed during the pandemic to allow pedestrians will remain car-free

Most streets that were closed across the nation so people could get outside more have since reopened. But some permanent closures, such as in Washington, D.C., and San Francisco, are wildly popular.

Nurse Katie Leonard uses a kayak to bring supplies to Patsy Costello, 88, as she sits trapped in her vehicle Dec. 31 on Astrid Drive in Pleasant Hill, Calif.. Costello drove her car on the flooded street thinking she could make it, but it stalled in the two feet of water.

A stubborn La Nina and manmade warming are behind recent wild weather, scientists say

In a world getting used to extreme weather, 2023 is starting out bonkers. Meteorologists are saying it's typical weather weirdness, with a boost from human-caused climate change.

Resource Conservation District of the Santa Monica Mountains Model of the wildlife corridor bridge over a freeway north of Los Angeles in this undated photo.

California breaks ground on largest urban wildlife crossing

Officials held a ceremony Friday to mark the construction of a $90 million bridge over a freeway and feeder road near downtown Los Angeles.

The paint marking the lane is faded and in some places non-existent and speeding cars, as you can see here, often drift into the bike lane. The city of Chicago recently installed new stop signs in the area to slow cars down, and may put plastic bollards between the car and bike lanes.

More cyclists are being killed by cars. Advocates say U.S. streets are the problem

The pandemic got more people riding bikes, but the number of cyclists hit and killed by cars is rising at an alarming rate. "We're buying materials for ghost bikes in bulk," one cycling advocate says.

Food insecurity is driving women in Africa into sex work, increasing HIV risk

A study found that giving direct food support to women and girls in sub-Saharan Africa cut their risk of contracting HIV by 64%, because it alleviated the pressure to engage in high-risk sex.

To help new students adapt, some colleges are eliminating grades

Amid growing concerns about mental health, some schools seek to ease the pressure on first-year students. Critics say this "ungrading" amounts to coddling and could set them up for failure.

April Fools' Day might be the world's longest-running joke. No one knows how it began

The true history of April Fools' has been a mystery for ages. The theories around its origin story have involved everything from Roman gods and fake popes to the Gregorian calendar and gullible fish.

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