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.

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

Local officials and emergency response personnel in Dallas are gauging the extent of damage inflicted by a powerful tornado that touched down in the city on Sunday night. While extensive structural damage was apparent by Monday morning, no fatalities or injuries have been reported.

After nearly a month of fraught negotiations, Israeli Prime Minister Benjamin Netanyahu has abandoned his attempt to form a new government. On Monday the longtime leader, who heads the conservative Likud party, acknowledged his failure to cobble a coalition together from last month's muddled election results and returned the mandate to President Reuven Rivlin.

The U.S. may now keep some troops in northeast Syria, Defense Secretary Mark Esper said on Monday. It is the latest in a series of consequential pivots that the Trump administration has made in its Syria policy.

The rap on Mitt Romney is that though he isn't a fan of President Trump, when he speaks out, it's in a fairly lukewarm way.

And then it was revealed over the weekend that he's been behind an anonymous Twitter account under the nom de plume Pierre Delecto.

Brain scientists are offering a new reason to control blood sugar levels: It might help lower your risk of developing Alzheimer's disease.

"There's many reasons to get [blood sugar] under control," says David Holtzman, chairman of neurology at Washington University in St. Louis. "But this is certainly one."

Updated at 11:50 a.m. ET

Three of the biggest U.S. drug distributors and a drug manufacturer have reached a last-minute deal with two Ohio counties to avoid what would have been the first trial in a landmark federal case on the opioid crisis.

Summit and Cuyahoga counties announced Monday morning that the tentative deal amounts to roughly $260 million.

Uganda explicitly bars government officials from accepting gifts of any kind from cigarette-makers. French and British officials must publicly announce any encounters with representatives of the industry. Thailand and the Philippines won't even let officials take a meeting except under the narrowest of circumstances.

These are some of the measures deployed by countries around the world to limit influence over their anti-smoking policies, according to the first-ever Global Tobacco Industry Interference Index.

October marks the start of a new flu season, with a rise in likely cases already showing up in Louisiana and other spots, federal statistics show.

The advice from federal health officials remains clear and consistent: Get the flu vaccine as soon as possible, especially if you're pregnant or have asthma or another underlying condition that makes you more likely to catch a bad case.