Science, Spoken

“I am a bit concerned about your telomeres,” the doctor told me, evenly. Telomeres are the caplike segments at the ends of the strands of DNA that make up your chromosomes—think of the plastic aglets at the ends of a shoelace—and some of mine, he could see, were not as long as he would have liked them to be. Learn more about your ad choices. Visit podcastchoices.com/adchoices

The Resomator stands monolithic in the corner of a room on the ground floor of a building at UCLA. It’s as sterile as a hospital in here, but every patient is already dead. This is the penultimate stage of their time under the care of Dean Fisher, director of the Donated Body Program at the UCLA David Geffen School of Medicine. Learn more about your ad choices. Visit podcastchoices.com/adchoices

The eyes are unwell. Their childhood suppleness is lost. The lenses, as we log hours on this earth, thicken, stiffen, even calcify. The eyes are no longer windows on souls. They’re closer to teeth. To see if your own eyes are hardening, look no further than your phone, which should require no exertion; you’re probably already there. Keep peering at your screen, reading and staring, snubbing life’s...

Ever wonder how a mirror works? If you want to find the path that light takes when reflecting off a surface, you could use Fermat's Principle. This states something like this: The path that light takes is the path that takes the least time. When going from point A to point B, light will travel along the path that takes less time than any other options. I actually used this idea in a question for m...

Millennials, we’re assured by endless headlines, are the people most addicted to their devices. Addled by social networking, obsessed with taking selfies and hustling for likes, youngsters can’t put their damn phones down. Amirite? Nope. That is wrong. The data suggests that the ones most hooked on their devices are those graying GenXers. Research by Nielsen, for example, found that Americans aged...

In the hills near Santa Barbara, something funky is growing. No, it’s not the newest strain of bubba kush. It’s coffee, sprouting farther north than it should be. Coffee belongs in the tropics—it doesn't like cold snaps. But here at Frinj Coffee, a special variety called geisha flourishes. And it’s about to get a whole lot more special—thanks, actually, to cannabis. Learn more about your ad choice...

I don’t think I’m the only parent who frets about their kids’ screen time. The Phineas and Ferb binges. Saturday nights playing Uncharted. It’s all turning their brains to sausage, right? Developmental psychologist Alison Gopnik wants us to take a deep breath—and focus less on how much kids use tech and more on how kids can use tech to their advantage. Learn more about your ad choices. Visit podca...

After a wimpy winter, spring break has arrived, and skiers and snowboarders from Maine to Mammoth Lakes are stoked. More than 18 feet of snow has dropped at Squaw Valley, Calif., in March; Utah’s famed powder resorts have finally broken the 100-inch mark; and New England has been pummeled by four big storms pushing closing dates to late April. At the same time, there are warning signs about the fu...

Paul ErdÅ‘s, the famously eccentric, peripatetic and prolific 20th-century mathematician, was fond of the idea that God has a celestial volume containing the perfect proof of every mathematical theorem. “This one is from The Book,” he would declare when he wanted to bestow his highest praise on a beautiful proof. Never mind that ErdÅ‘s doubted God’s very existence. Learn more about your ad choices...

More than a decade ago, researchers at the Pennington Biomedical Research Center in Baton Rouge began recruiting young, healthy Louisianans to voluntarily go hungry for two years. In addition to cutting their daily calories by 25 percent, the dozens who enrolled also agreed to a weekly battery of tests; blood draws, bone scans, swallowing a pill that measures internal body temperature. Learn more...

Montecito is coming back to life this morning. The 9,000 person town to the east of Santa Barbara has been empty since Tuesday, when mandatory evacuations forced residents out of their homes for the fifth time in four months. This week it was a channel of tropical moisture called the Pineapple Express, dumping bands of intense rain and triggering flash floods throughout Southern California. Learn...

Chevron would like you to know that it believes in climate change. It also believes people cause it by burning carbon-based fuel—the kind Chevron extracts from the ground, refines, and sells. In fact, Chevron believes all this so hard that today its lawyer said so, in a federal court in San Francisco. Intergovernmental Panel on Climate Change? Yup. They’re right. That’s not as up-is-down as it mig...

Do you like a planet that hasn’t yet melted? Do you like sushi? How about breathing? Then you’re secretly in love with plankton, tiny marine organisms that float around at the mercy of currents. They sequester carbon dioxide and provide two thirds of the oxygen in our atmosphere and sacrifice themselves as baby food for the young fish that eventually end up on your plate. Yet science knows little...

If you think your on-the-job training was tough, imagine what life is like for newbie surgeons. Under the supervision of a veteran doctor, known as an attending, trainees help operate on a real live human, who might have a spouse and kids—and, if something goes awry, a very angry lawyer. Now add to the mix the da Vinci robotic surgery system, which operators control from across the room, precisely...

“Want to come to a quantum computing party?” I wasn’t expecting the question. My brain was hurting: I’d just finished an hour-long interview with Jarrod McClean, a Google quantum computing scientist, and I was mentally planning to write up my notes. His talk had caught my attention the day before: McClean spoke animatedly, bobbing a magnificent head of shoulder-length ringlets, as he pointed at eq...

It might not be apparent unless you're driving through the mid-longitudes of Interstate 70, but around 40 percent of the land in the United States is farmland. Understanding what happens on that acreage is complicated—for individual farmers and agricultural conglomerates. Understanding how to improve what’s going on is even harder. That’s why Granular—a farm software business under the agriculture...

This year, nearly 1.7 million Americans will be diagnosed with cancer. Most will find out in the usual way; after having tiny blobs of tissue slurped up through a needle, smeared and stained on a slide, and put under the discerning eye of a pathologist. But starting this week, Medicare patients with advanced cancers will have access to a more 21st century diagnostic: Their cells can now be sequenc...

If you want to avoid getting sick on a plane, the worst place to sit, according to Charles Gerba, is along the aisle. The issue is exposure—not just to other passengers, but anything they touch. That means obvious hot spots (arm rests, tray tables, in-flight magazines) and less-obvious ones like aisle seats, which people use to steady themselves as they move about the cabin, frequently on their wa...

The bionic hand closes slowly. Its slender metal digits whirr as they jitter into a loose fist, as though they are wrapping around an invisible baton. "OK, closed," says the test subject. The test subject is Amanda Kitts. In 2006, a Ford F350 hit her Mercedes sedan head-on. The collision rent the truck's tire from its chassis and shoved the axle into Kitts' car, where it nearly severed her arm. "I...

In the early 2000s, Greg Wyler, former founder of a semiconductor company, was laying fiber in Africa. He wanted to do something that mattered. Semiconductors didn’t matter, you know? But linking people to each other and to information did, he thought. “The lesser educated version of myself said, ‘Fiber is the answer,'" says Wyler. "'I’ll run it everywhere.’” He didn’t run it everywhere, though he...

It took ten years to build the Maverick, a dorm-fridge-sized box that takes in a cartridge with a little bit of blood—more than a drop but, you know, not a pint, either—and spits out new knowledge. On the cartridge is a silicon chip carved with antibody-lined channels; if any of a range of molecules that signal things like celiac disease are floating around, they stick to the antibodies, changing...

It’s hard to pick which species to save in Brazil right now. Yellow fever is tearing through primate populations, wiping out squirrel and howler monkeys. Poachers are nabbing giant anteaters for meat and blue macaws to sell as exotic pets. But conservation biologist Rogério Zacariotti wants to save a venomous yellow viper—the golden lancehead. But the snake isn't making it easy for him. Learn more...

For arguably the most famous physicist on Earth, Stephen Hawking—who died Wednesday in Cambridge at 76 years old—was wrong a lot. He thought, for a while, that black holes destroyed information, which physics says is a no-no. He thought Cygnus X-1, an emitter of X-rays over 6,000 light years away, wouldn’t turn out to be a black hole. (It did.) He thought no one would ever find the Higgs boson, th...

On March 4, an embryologist at Pacific Fertility Center was doing a routine walk-through of the clinic’s collection of waist-high steel tanks, each one filled with thousands of liquid nitrogen-bathed vials of frozen sperm, eggs, and embryos. Learn more about your ad choices. Visit podcastchoices.com/adchoices

It is once again Pi Day (March 14—which is like the first digits of pi: 3 and 14). Before getting into this year's celebration of pi, let me just summarize some of the most important things about this awesome number. Outside the US, Pi Day should probably be July 22 (22/7)—this fraction is a surprisingly good estimate of pi. You can find the value of pi with a mass and a spring. The value of pi is...