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The asteroid smashed into Earth. And from miles under the Earth's surface, rock hurtled upward to a height twice that of Mount Everest and then collapsed outward to form a ring of mountains.

Overall, U.S. life expectancy dipped in 2015 — the first drop since 1993. That's because the death rate went up between 2014 and 2015, driven by an increase in mortality among people younger than 65.

The troubled Olympic Games in Rio de Janeiro will have their opening ceremony on Friday. We get a sneak preview of how the country will be showcasing its unique culture and heritage.

More than 90 percent of voters rejected any future plans for permanent resettlement of noncitizens. But not enough people voted — and some of those who did cast intentionally botched ballots.

Jobless claims hit an all-time record, with 10 million filed in the last two weeks. With so many people filing, there are glitches. Experts offer suggestions on how to get through.

Retired Lt. Gen. Mike Flynn may have kept up contacts with the promoters of a vast Middle Eastern nuclear deal even as he was serving as national security adviser.

Voter turnout was up among college students by more than the nation as a whole in the last election, a Tufts University report says. But that turnout varied greatly across different types of colleges.

A modified version of the sport, billed as a bridge between tackle and flag football, will be piloted with select youth football programs this fall. It features fewer players and a shorter field.

The credit reporting agency said Chairman and CEO Richard Smith is retiring — just weeks after Equifax acknowledged that hackers had accessed the personal information of up to 143 million consumers.

Plus you'll find two new studies on school choice and kindergarten readiness in our weekly roundup of education news.