Spending the summer as a tour guide on a glacier.

A trip to the Iditarod.

Following the Yukon Quest, the Iditarod’s thousand-mile rival.

Behind the scenes at the Yukon Quest.

On Alaska’s mushing dynasties.

A profile of the Michael Jordan of mushing.

The end of the rock star era.

“When I woke up hours later, I really believed I had been in those mountains hiking — that it was not a dream. And I really had lost my voice. I had lost my words. I was unable to say, ‘I am trapped in my brain’ or, ‘My memories are mixing with imagination.’”

When Carmen Segarra was hired to examine Goldman Sachs for the New York Fed, she bought a small recorder and began taping her meetings. Here is what she found before she was fired.

Sam Simon made a fortune from The Simpsons. Now, diagnosed with terminal cancer, he is racing to spend it.

The war over Airbnb gets personal.

An essay on insomnia.

We know we need sleep. We just don’t know why.

Coming to grips with night terrors.

The state of sleep research and what Americans’ unprecedented lack of shuteye may mean in the long run.

On Ambien and the search for the next blockbuster insomnia drug.

After losing his sight at age 3, Michael May went on to become the first blind CIA agent, set a world record for downhill skiing and start a successful Silicon Valley company. Then he got the chance to see again.

One killer’s creepy obsession.

Daniel Kish had his eyes removed at age 1 because he was born with retinoblastoma, a cancer that attacks the retinas. But many people would never guess that he is blind.

The perspective-bending art of identical twins Trevor and Ryan Oakes.

Captain Iván Castro lost his vision in Iraq, but that didn’t stop him from running marathons.

The allure of invisibility.

How 3-D images affect the eye, plus proof that viewers have hated the technology since at least 1953.

How animals see.

The grim world of outsourced content moderation.

A profile of Nicki Minaj.

Life in America without dental care.

“The term douchebag, again used as we already use it, has the power to name white ruling class power and white sexist privilege as noxious, selfish, toxic, foolish, and above all, dangerous.”

The author of The Hot Zone on how geneticists can help contain the current outbreak.

Frozen fish from the supermarket often has excess ice — and consumers pay the price.

Inside New Jersey’s halfway houses.

After the 2001 terrorist attacks, California lawmakers sought a way to channel the patriotic fervor and use it to help victims, families and law enforcement. Their answer: Specialty memorial license plates emblazoned with the words, “We Will Never Forget.”

The anatomy of a sex abuse scandal at a Christian school in Oklahoma.

Police force fails to protect the state’s most vulnerable residents.

A son’s secret brings a Southern Baptist minister to his knees.

How Earl Eugene Mawyer got a chance to be a hero.

On the “toxic legacy” of Anniston, Alabama.

At 24, Ray Wauson was thrilled to land a job as an armored-car guard. But he was entering an unregulated world in which the people guarding the cargo are often defenseless against the cargo itself.

How faulty data lowered Milwaukee’s crime rate.

City cameras track anyone, even Minneapolis Mayor Rybak.

On homeless sex offenders in metro Phoenix.

A year-long examination of the abuse investigations of unlicensed youth reform programs that operate in Florida and are overseen by the Florida Association of Christian Child Caring Agencies, a private, nonprofit group.