As cars become smarter and safer, some members of Congress want to require them to be built to prevent drunk driving.

Sens. Tom Udall, D-N.M., and Rick Scott, R-Fla., introduced legislation last week that would make it mandatory for all new cars and trucks to come loaded with passive, virtually unnoticeable, alcohol detection systems by 2024.

If there's one thing you do want to catch from a trip to your doctor, it's her optimism.

A new study, published Monday in the journal Nature Human Behavior, finds that patients can pick up on subtle facial cues from doctors that reveal the doctor's belief in how effective a treatment will be. And that can have a real impact on the patient's treatment outcome.

Updated at 9:15 p.m. ET

Immigration hard-liners inside and outside the White House are fighting to keep Ken Cuccinelli and Mark Morgan in the running for the top job at the Department of Homeland Security after their candidacies hit a snag.

On a cold, sunny October day on the outskirts of Copenhagen, Denmark, a group of men dressed in black gathers outside Brondby Stadium to shoot off a couple of rockets, raise their fists and shout about how the home team will soon beat — and beat up — the visiting archnemesis, FC Copenhagen.

Police are out in force, riot helmets at the ready. Brondby-Copenhagen matches have a history of leading to vandalism, arrests and general mayhem.

President Trump is chastising Republicans for not sufficiently having his back as he tries to weather an impeachment inquiry from Democrats.

"Republicans have to get tougher and fight," Trump said during a Cabinet meeting on Monday. "We have some that are great fighters, but they have to get tougher and fight because the Democrats are trying to hurt the Republican Party for the election."

Electric assisted bicycles, or e-bikes, are becoming more and more popular across the United States. Throughout the country's national parks, that could be a good and a bad thing.

It can be tough to distinguish an e-bike from a regular road or mountain bike by sight, but once you start pedaling, you sure feel the difference.

Facebook announced new efforts Monday to curb the spread of false information on its platform ahead of the 2020 presidential election.

But, in an acknowledgement of the struggle the social network faces to stay ahead of groups intent on manipulating its users, Facebook said it had taken down another set of disinformation networks, this time tied to Iran and Russia. That adds to the more than 50 such networks the company said it has already removed in the past year.

Protests continue in Chile after a weekend of violence and destruction over a recent transit hike. The unrest continued after President Sebastián Piñera suspended the 4 percent fare increase.

The protests in the capital city of Santiago come amid growing discontent over rising the cost of living and lack of salary increases. The weekend's riots saw protesters shut down the Metro de Santiago and burn down a high rise. Officials have reported at least eight deaths as a result of the protests.

The Justice Department is proposing to begin collecting DNA samples from hundreds of thousands of immigrants crossing the border, creating an enormous database of asylum-seekers and other migrants that federal officials say will be used to help authorities fight crime.

Scientists have created a new way to edit DNA that appears to make it even easier to precisely and safely re-write genes.

The new technique, called prime editing, is designed to overcome some of the limitations of CRISPR. That technique, often described as a kind of molecular scissors for genes, has been revolutionizing scientific research by letting scientists alter DNA.