What is it about terminating half a twin pregnancy that seems more controversial than reducing triplets to twins or aborting a single fetus? After all, the math’s the same either way: one fewer fetus. Perhaps it’s because twin reduction (unlike abortion) involves selecting one fetus over another, when either one is equally wanted. Perhaps it’s our culture’s idealized notion of twins as lifelong soul mates, two halves of one whole. Or perhaps it’s because the desire for more choices conflicts with our discomfort about meddling with ever more aspects of reproduction.

On the Birthright Israel program, which sends young American Jews on a tour of Israel free of charge, thanks to massive funding from both the Israeli government and philanthropists like the conservative casino magnate Sheldon Adelson.

A new era is dawning for Birthright. What began as an identity booster has become an ideology machine, pumping out not only Jewish baby-makers but defenders of Israel. Or that’s the hope.

A history of the cell phone ringtone.

Many recent hip-hop songs make terrific ringtones because they already sound like ringtones. The polyphonic and master-tone versions of “Goodies,” by Ciara, for example, are nearly identical. Ringtones, it turns out, are inherently pop: musical expression distilled to one urgent, representative hook. As ringtones become part of our environment, they could push pop music toward new levels of concision, repetition, and catchiness.

“Robert Victor Sullivan, whom you’ve surely never heard of, was the toughest coach of them all. He was so tough he had to have two tough nicknames, Bull and Cyclone, and his name was usually recorded this way: coach Bob “Bull” “Cyclone” Sullivan or coach Bob (Bull) (Cyclone) Sullivan. Also, at times he was known as Big Bob or Shotgun. He was the most unique of men, and yet he remains utterly representative of a time that has vanished, from the gridiron and from these United States.”

A yearlong investigation by BuzzFeed News, based on leaked recordings, internal documents, and dozens of interviews with fans and insiders, reveals how Robbins has berated abuse victims and subjected his followers to unorthodox and potentially dangerous techniques. And former female fans and staffers have accused him of inappropriate sexual advances.

On how search and advertising became indistinguishable, the finer points of not being evil, and why privacy is by nature immeasurable. How Google made us the product:

“Google conquered the advertising world with nothing more than applied mathematics,” wrote Chris Anderson, the editor of Wired. “It didn’t pretend to know anything about the culture and conventions of advertising—it just assumed that better data, with better analytical tools, would win the day. And Google was right.”

A profile of Tarn and Zach Adams, creators of the computer game Dwarf Fortress:

Dwarf Fortress may not look real, but once you’re hooked, it feels vast, enveloping, alive. To control your world, you toggle between multiple menus of text commands; seemingly simple acts like planting crops and forging weapons require involved choices about soil and season and smelting and ores. A micromanager’s dream, the game gleefully blurs the distinction between painstaking labor and creative thrill.

Remembering George Plimpton’s old-fashioned style.

Above all, he was a gentleman, one of the last—a figure so archaic, it could be easily mistaken for something else. No, my father’s voice was not an act, something chosen or practiced in front of mirrors: he came from a different world, where people talked differently, and about different things; where certain things were discussed, and certain things were not—and his voice simply reflected this.

An oral history.

The autonomous car of the future is here:

I was briefly nervous when Urmson first took his hands off the wheel and a synthy woman’s voice announced coolly, “Autodrive.” But after a few minutes, the idea of a computer-driven car seemed much less terrifying than the panorama of indecision, BlackBerry-fumbling, rule-flouting, and other vagaries of the humans around us—including the weaving driver who struggles to film us as he passes.

"Opium does not deprive you of your senses. It does not make a madman of you. But drink does. See? Who ever heard of a man committing murder when full of hop. Get him full of whiskey and he might kill his father."

A journey into New York’s turn-of-the-century opium dens to find out who gets hooked and why.

FRANCO: “Straight” and “gay” are fairly recent phenomena. One of the things the great book Gay New York: Gender, Urban Culture and the Making of the Gay World, 1890–1940 is about is the way those labels have changed behavior. Between World War I and World War II, straight guys could have sex with other guys and still be perceived as straight as long as they acted masculine. Whether you were considered a “fairy” or a “queer” back then wasn’t based on sexual acts so much as outward behavior. Into the 1950s, 1960s and so on, the straight and gay thing came up based on your sexual partner. Because of those labels, you do it once and you’re gay, so you get fewer guys who are kind of in the middle zone. It sounds as though I’m advocating for an ambiguous zone or something, but I’m just interested in the way perception changes behavior.

How is Canada’s “post-AIDS” generation coping? Not that well.

[I]n some ways we are still hopelessly lost. A generation of men who could have been our mentors was decimated. The only thing we learned from observing them was to ruthlessly identify “AIDS face,” that skeletal appearance the early HIV drugs wrought on patients by wasting away their bodily tissues. But those faces grow more rare each day.

On the people who were working at Logan Airport when the hijacked flights departed:

They are the rarely noticed casualties of the terrorist attacks: the security guard, the ticket agent, the baggage handler on the ramp. They made it home that night, but with images they couldn’t shake, a pain uncomfortable to voice. They can’t believe it has been 10 years. They can’t believe it has only been 10 years.

How reality TV has changed tattooing.

Tattoos and tattoo artists have an undeniable power to attract, repulse, and intimidate. But when confronted with all this life and color, reality TV steamrolls it into the familiar “drama” of preening divas and wounded pride. “Everybody thinks they’re gonna change it,” said Anna Paige, an artist who said she’d turned down her chance at TV stardom. “Everybody thinks they’re gonna have some power.” But wait, isn’t she profiting from tattooing’s mass appeal? “I would have made money anyway.”