The recent graduate, 21, was on a trail in the Lake Tahoe region of California on Tuesday and did not return, prompting a search. His death is under investigation, the authorities said.

There’s a lot of hype, but not a lot of certainty among forecasters yet. Here are three scenarios to watch.

If the party had waited out the storm in their cabins, one of the skiers said, the outcome might have been different.

Did you notice a dip in the air quality the last few days? It’s winter’s fault.

The images of political prisoners, taken just before they were killed by Nazis in 1944, were put up for auction on eBay. The sale was pulled shortly thereafter.

Nasrallah Abu Siyam, 19, was shot dead by an Israeli settler, according to a witness and Palestinian health officials, amid rising violent settler attacks in the Israeli-occupied territory.

Officials are designing new ways to protect the shorelines from sudden flooding and longer storm seasons.

The German actor Lars Eidinger lost control of the weapon in the final scene of Shakespeare’s play.

An analysis of ship movements shows that the Trump administration is isolating the island at one of its most vulnerable moments.

Few laws govern backcountry skiing in California. Experts say that people engage in the sport at their own risk, but guides have responsibilities to keep clients safe.

Tech workers are increasingly worried that the artificial intelligence they are building will replace them. But some are optimistic that it is just one more tool to work with.

A writer grapples with the death of her sister, and the end of a marriage, during a challenging trek in Tibet.