Samantha Raphelson

An Atlantic Ocean current that helps regulate the global climate has reached an 1,000-year low, according to two new studies in the journal Nature.

While scientists disagree about what's behind the sluggish ocean current, the shift could mean bad news for the climate. The Atlantic Meridional overturning circulation [AMOC] – often called the conveyor belt of the ocean – exchanges warm water from the equator with cold water in the Arctic.

The only way to stop a bad guy with a gun is a good guy with a gun.

It's a common refrain touted by gun rights advocates, who argue that using guns in self-defense can help save lives. But what is the actual number of defensive gun uses?

President Trump quietly signed an act last month encouraging U.S. officials to visit Taiwan, angering China amid mounting tensions over trade.

The growing momentum for tighter gun control after the deadly school shooting in Parkland, Fla., is highlighting the National Rifle Association's history of aggressively confronting challenges to what it regards as Second Amendment rights.

Federal limits on both research into gun violence and the release of data about guns used in crimes are powerful reminders of the lobbying group's advantages over gun control activists. For decades, the NRA pushed legislation that stifled the study and spread of information about the causes of gun violence.

The White House has ordered the State Department to put on hold $200 million in recovery funds to Syria, following President Trump's remarks last week signaling a possible withdrawal of American troops from Syria.

The U.S. electricity sector is eyeing the developing electric car market as a remedy for an unprecedented decline in demand for electricity.

The Community Relations Service was born out of one of the most contentious periods in American history — the civil rights movement of the 1960s.

The Justice Department peacemaking office established by the 1964 Civil Rights Act has provided communities dealing with racial or other tensions with professional mediators and other confidential services to help resolve conflict.

Updated on Sunday at 10:00 a.m. ET

Hundreds of thousands of students, teachers, parents and victims rallied in Washington, D.C., and across the country on Saturday to demand tougher gun control measures, part of a wave of political activism among students and others impacted by school shootings.

Survivors of mass shootings are facing relentless harassment and renewed trauma from conspiracy theorists who claim the attacks were staged by the federal government.

From Sandy Hook to Parkland, the idea that the victims are hired actors who stage tragedies in order to achieve sinister political goals has drifted from dark corners of right-wing media into the mainstream.

A new mega-dam being built by Ethiopia on the Nile River is threatening to spark a war over water and shift political influence in northeastern Africa.

Ethiopia sees the dam as the key to its economic future, but its neighbor to the north, Egypt, fears the dam could spell doom for its water supply, says BBC Africa correspondent Alastair Leithead. The Nile supplies nearly 85 percent of all water in Egypt, according to the Food and Agriculture Organization of the United Nations.

If you've been watching the Winter Games on TV, you may have noticed there's not a lot of snow in Pyeongchang. While the South Korean region is known for its frigid winters, major snowstorms are rare in February.

That's where Snow Making Inc. (SMI), comes in. The Michigan-based company has installed snow-making machines at seven Winter Olympics, including Pyeongchang.

Vice President Mike Pence is facing backlash for his staunch efforts to ignore North Korean officials at the Winter Olympic Games, even as the two Koreas continued their temporary truce, marching and competing as one team.

Pence's cold demeanor toward the North Koreans at the Pyeongchang games was overshadowed by friendly cooperation between the North and South. The vice president also drew criticism from some openly gay members of Team USA, who questioned his role at the Olympics due to his anti-LGBT views.

If you've ever tried to catch an Uber on a rainy day during rush hour or after the ball drops on New Year's Eve, you're familiar with dynamic pricing. That's when the price of a ride costs more or less depending on the demand for drivers.

The pricing strategy has long been used by other sectors of the travel industry, such as airlines and hotels, to balance supply and demand, and last month, a luxury restaurant in London rolled out a similar model.

The death of a former major league baseball player in his native Venezuela this week is renewing concerns over the Latin American country's growing health crisis amid ongoing economic and political turmoil.

Coca-Cola introduced four new fruit-flavored versions of Diet Coke this week in an effort to entice former soda drinkers and LaCroix-guzzling seltzer lovers.

The new flavors — Feisty Cherry, Twisted Mango, Ginger Lime and Zesty Blood Orange — are sold in slimmer, redesigned cans. They were launched as part of the beverage company's endeavor to offset slumping Diet Coke sales, which have steadily declined since the height of soft-drink consumption in the mid-2000s.

Cape Town officials are tightening water restrictions amid claims the city could run out of water by April 21. After three years of intensive drought, officials say residents are bracing for "Day Zero," the day water could stop flowing.

South Africa's second-largest city would be the first major city in the developed world to run out of water, if residents do not heed new stricter water measures. The region is experiencing its worst drought in a century, which experts say has been exacerbated by climate change and in Cape Town, rapid population growth.

The Trump administration must decide by next week whether to impose tariffs on the imports of solar panel components.

Some U.S. manufacturers have complained that cheap imports are forcing them out of business, while domestic installers oppose tariffs because cheap, imported solar panels have driven the industry's recent growth.

Lawmakers in the United Kingdom are debating a new tax on disposable cups in an effort to cut down on waste.

While the so-called "latte levy" is controversial, the goal is to replicate the success of Britain's tax on plastic bags; their use has declined by 80 percent since the tax was introduced in 2015. Proponents of the tax say it would encourage people to carry around their own reusable cups rather than use disposable ones, which in their current form are difficult to recycle.

Search and rescue efforts continue in Santa Barbara County, Calif., after deadly mudslides killed at least 17 people and destroyed dozens of homes.

Flash floods swept down hillsides recently devastated by wildfires, highlighting the heightened risk of mudslides after firefighters contained the flames. Officials say 43 people are still missing, and experts are warning that more rainfall could cause more destruction.

America needs more truck drivers. The trucking industry is facing a growing shortage of drivers that is pushing some retailers to delay nonessential shipments or pay high prices to get their goods delivered on time.

A report from the American Trucking Associations says more than 70 percent of goods consumed in the U.S. are moved by truck, but the industry needs to hire almost 900,000 more drivers to meet rising demand.

The number of migrants who died crossing the Mediterranean Sea surpassed 3,000 for the fourth year in a row, despite an overall drop in the number of refugees making the journey.

The International Organization for Migration has called the Mediterranean "by far the world's deadliest border," as more than 33,000 migrants have died at sea trying to enter Europe since 2000.

Updated at 1:07 p.m. ET

President Trump insisted Saturday that he is "a very stable genius," following the recent publication of a book that raises questions about his mental state and fitness for office.

Speaking to reporters at Camp David on Saturday, Trump called Michael Wolff, author of Fire and Fury: Inside The Trump White House, "a fraud" and reiterated his earlier claim on Twitter that Wolff is not trustworthy.

Many pet owners are aware of the dangers to dogs and cats in extreme heat, but the risks can be even greater during a cold snap.

Jennifer Brea was a PhD candidate at Harvard University when flu-like symptoms and a high fever brought her down for more than five years.

After her condition stumped several doctors, the 28-year-old filmed herself on her iPhone, including an episode when she was unable to move or speak. She showed the footage to her doctor, and in 2012 – a year and a half after her initial fever – she was diagnosed with a condition called myalgic encephalomyelitis, or chronic fatigue syndrome.

The Douglas County Sheriff's office south of Denver says a suspect fired more than 100 rounds in a shooting that killed one police officer and wounded four others, along with two civilians, on Sunday morning.

The officers were shot after responding to an initial report of domestic violence at the Copper Canyon Apartments just after 5 a.m., Sheriff Tony Spurlock said in a news conference.

Over 26 hours and across 39 time zones, the world is celebrating the end of 2017.

New Year's celebrations kicked off in Samoa, Christmas Island and New Zealand as those countries were the first where the clock struck midnight. Here in the U.S., many events are set to occur under heightened security, including in Las Vegas, which is still reeling from the deadliest mass shooting in the nation's modern history three months ago.

Author Peter Zheutlin never wanted a dog, let alone a rescue. He had always believed, as a lot of people do, that rescue dogs are damaged goods.

Now Zheutlin can't imagine life without a dog, and he's become so driven by the issue of stray dogs that he's written two books about it. He tells Here & Now's Lisa Mullins the number of stray dogs has "cascaded out of control" in some parts of the U.S.

Recovery efforts are ongoing in Houston from nearly $200 billion worth of damage caused by Hurricane Harvey in late August.

More than 100,000 homes were damaged in historic flooding, and thousands of residents are still living in hotels and rental housing while they wait for insurance checks.

An episode of the Netflix anthology series Easy follows a group of neighbors who band together to stop a baseball-capped thief from stealing packages right off their doorsteps.

The episode examines the cultural implications of a world altered by the internet, online shopping and the dominance of Amazon Prime.

"It's not about the package itself or the contents of the package," says one woman in the TV series. "We're a community; there are children here. I mean, it starts with packages, who knows? I just feel unsafe."

Following in the footsteps of the Oregon Trail fur traders, Americans are again flocking to the West in great numbers, according to new data from the U.S. Census Bureau. But of course, this time they aren't making the journey in covered wagons.

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