George Otto was a respected family physician with a bustling clinic in the northwest corner of the city. But he had a secret: after hours, he was running a booming fentanyl business.

Nick Lim provides tech support to the U.S. networks of White nationalists and conspiracy theorists banned by the likes of Amazon.

The writer of a contentious piece of science fiction, “I Sexually Identify as an Attack Helicopter,” drew the internet’s ire. Now she tells her story.

A shoot-out at a Big Bend ranch captured the nation’s attention: first as an alleged ambush by undocumented migrants, then as a fear-mongering hoax. The real story is much more mysterious.

In the wake of revolution, Libyans envision their future.

The author on his 25 years in solitary confinement.

A profile of the almost-president.

The possibilities and pitfalls of massive open online courses (MOOCs).

Inside New England’s thriving arms industry.

The Yale professor suspected of murdering his student.

On literary manifestos, long-distance reading, and the egg of death.

Pimp, brawler, Old Master.

The laundry wars of Silicon Valley.

How New York real estate became the new Swiss bank account.

Why the second Indiana Jones was so dark.

Raising a cow on an industrial feedlot.

The debate over who’s responsible when a child kills.

An author confronts her troll.

The story of a call center virtuoso.

The uncomfortable, and increasingly vital, relationship between Barack Obama and billionaire donors.

An essay about phone dials and a response to the end of blogging.

Debates surrounding physician-assisted dying in the U.S.

Exploring remote atolls in the South Pacific.