Yassiry Gonzalez goes to bed early. But often she wakes up around 1 or 2 in the morning. And from then on, sometimes all the way through dawn, the New York City high school student is on her phone — on FaceTime with close friends, or looking through Instagram.

"Sometimes, I'm so tired that I'll just fall asleep in school." She estimates the all-nighters happen once or twice a week. And on the weekends? "There's no sleep. No sleep."

Looking back, 2018 may be the year that a critical mass of people started wondering: Am I spending too much time on my phone?

Accusing U.S. lawmakers of interfering in its affairs, Saudi Arabia has angrily rejected newly passed U.S. Senate resolutions ending U.S. support for the war in Yemen and laying blame for the death of journalist Jamal Khashoggi at the feet of Saudi Crown Prince Mohammed bin Salman.

Saudi Arabia denounced the U.S. Senate's position on Monday as being "based on baseless allegations and accusations" that distort the truth.

This month, a comet called 46P/Wirtanen is doing a dramatic fly-by, giving Earth an unusually good view of its greenish glow.

The timing of the comet's apparition — and its seasonally appropriate coloring — have led some to dub it the "Christmas Comet."

In recent years, Israeli Prime Minister Benjamin Netanyahu has cultivated friendships with rising nationalist and far-right leaders in Europe. His supporters say it's a smart diplomatic move to chip away at the European Union's longtime critique of Israeli policies — the nationalist leaders tend to be pro-Israel. But some Israelis argue Netanyahu is too accommodating of these leaders' controversial views on Holocaust history.

Planning a trip to to the Grand Canyon over the upcoming holidays?

You might want to have a Plan B...or at least bring your own trail maps.

While the Grand Canyon, along with the rest of the national park system, is expected to remain open in the case of a government shutdown, visitors centers at the facilities probably wont be. And some iconic sites, including the Statue of Liberty, may be closed altogether, if the park service follows past practices. That is of course unless Congress and the White House resolve their latest spat over funding the federal government.