Matthew S. Schwartz

For decades, the prevailing theory about the extinction of the dinosaurs was that an asteroid from the belt between Mars and Jupiter slammed into the planet, causing cataclysmic devastation that wiped out most life on the planet.

But new research out of Harvard University theorizes that the Armageddon-causing object came from much farther out than originally believed.

After three members of a family in New Zealand's largest city tested positive for the coronavirus, the city of Auckland has gone into lockdown — and the entire country is on high alert.

In a televised address Sunday evening, Prime Minister Jacinda Ardern said the country is taking a "precautionary approach that has served us so well as a country."

Updated at 12:23 p.m. ET

As more details emerge about a heated phone call between then-President Donald Trump and House Minority Leader Kevin McCarthy, R-Calif., as rioters were storming the Capitol, some lawmakers are pushing for Trump's lawyers to more fully explain the president's actions that day.

The sun was shining Saturday morning in Salt Lake City — a beautiful day, local officials said, that masked a hidden danger.

Four skiers in their 20s and 30s were killed in one of the most deadly avalanches in the history of Utah.

Eight skiers from two different groups were on steep terrain in the Wilson Glade area of Mill Creek Canyon — about 9,800 feet high — when they unintentionally triggered the slide, the Utah Avalanche Center said in an accident report.

For nearly an hour Saturday, about 50 vaccination opponents and right-wing supporters of former President Donald Trump delayed COVID-19 vaccinations when they protested at the entrance to Dodger Stadium, the site of a mass vaccination campaign.

Holding signs that said things such as "COVID=Scam," "Don't be a lab rat" and "Tell Bill Gates to go vaccinate himself," the protesters caused the Los Angeles Fire Department to close the stadium entrance as a precaution. People in hundreds of cars, waiting in line for hours, had to wait even longer.

Almost exactly one year after the first case of the coronavirus was detected in the United States, the country has now reached 25 million confirmed infections. As it has for months, the U.S. remains by far the most coronavirus-riddled country in the world.

It's the kind of purchase many shoppers make on impulse. Eggs, milk, yogurt and — why not? — a lottery ticket.

With just six numbers drawn Friday night — 4, 26, 42, 50, 60 and the Mega Ball of 24 — a ticket sold at a Michigan grocery store made somebody one of the richest people in the country.

NASA has more work to do, after a rocket test Saturday for its shuttle replacement ended with a premature and unexpected shutdown.

The test, at NASA's Stennis Space Center in Mississippi, was part of NASA's Artemis program, a plan to return to the moon in the coming years. NASA's test called for four engines to fire for eight minutes — roughly the time it will take for NASA's long-delayed Space Launch System (SLS) to generate the thrust needed to send the rocket to space.

The U.S. House of Representatives has opened an investigation into this month's attack on the U.S. Capitol. In a letter to the heads of America's leading intelligence and law enforcement agencies, House lawmakers asked for any information that could help them understand whether warning signs were missed.

Next week's swearing-in of President-elect Joe Biden will see the biggest security presence of any inauguration in U.S. history. For days, thousands of National Guard troops have been pouring into the capital, and by Wednesday's ceremony, up to 25,000 troops will be in place to guard against security threats.

Last summer, Dr. Anthony Fauci warned Congress that if the U.S. didn't get the coronavirus outbreak under control, the country could see 100,000 new cases per day.

Six months later, the U.S. is adding, on average, more than 271,000 new cases per day, according to data from Johns Hopkins University. Over the past 24 hours, 3,700 new deaths were recorded.

That brings the total number of reported cases in the U.S. to more than 22 million since the start of the outbreak — with a death toll of 373,000.

The violence at the U.S. Capitol on Wednesday was unprecedented in modern U.S. history — but some pro-Trump extremists are promising it was just a taste of things to come.

"Many of Us will return on January 19, 2021, carrying Our weapons, in support of Our nation's resolve, towhich [sic] the world will never forget!!!" one person wrote on Parler, a site friendly to right-wing extremists. "We will come in numbers that no standing army or police agency can match."

Updated at 12:45 a.m. ET Sunday

The U.S. has hit another devastating milestone: COVID-19 has killed more than 350,000 people in the country, according to a Johns Hopkins University tracker. The grim number comes as a new variant of the coronavirus is spreading across dozens of countries.

Updated at 9:37 p.m. ET Saturday

A federal judge threw out a lawsuit that challenges President-elect Joe Biden's victory Friday, as Congress moves toward finalizing the results of the 2020 election.

And on Saturday, a panel of judges at the Fifth Circuit Court of Appeals dismissed the case for "essentially" the same reasons as the lower court: the plaintiffs don't have standing to sue.

Updated at 2:25 a.m. ET on Monday

The violent explosion that rocked downtown Nashville, Tenn., on Christmas morning is believed to be a suicide bombing by Anthony Q. Warner, 63, U.S. Attorney Don Cochran said Sunday.

Authorities continue to ask those who knew or encountered the suspect to contact the FBI. The agency is still investigating, but there is no indication that anyone else was involved, Cochran said.

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