Science, Spoken

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Maybe DNA Can’t Answer All Our Questions About Heredity May 29, 2018

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Heredity is a powerful concept. It’s the thing that ties families together—that gives shape to their shared history of stories, of homes, of personalities. And more and more, it’s the way we understand families’ shared genetic inheritance.

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The Physics of Accelerating Spacecraft in The Expanse May 28, 2018

Show notes

If you like science fiction, I can recommend a show for you—The Expanse. It takes place in the not-so-distant future all right here in our own solar system. There are no pew-pew lasers or faster-than-light space travel. When humans are on a spacecraft, they either "float" around or use magnetic boots (except when the spacecraft is accelerating). There are no "inertial dampeners" in The Expanse. Not only that, but it has interesting characters and a compelling plot. I like it.

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Inconvenient Minifauna and the Invasion of the Hammerhead Flatworms May 25, 2018

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If I told you that flatworms had invaded France, you might say, c'est la vie. A worm is a worm, after all. But then I’d tell you they’re also known as land planarians, and you might think that sounds rather more alien. Then I’d say they’re also called hammerhead flatworms, and you might start getting nervous. Oh, and they grow to a foot long and release secretions from their hammerheads that glue them to their native French prey, the innocent little earthworms.

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Give the Robots Electronic Tongues May 25, 2018

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Humans lives their lives trapped in a glass cage of perception. You can only see a limited range of visible light, you can only taste a limited range of tastes, you can only hear a limited range of sounds. Them’s the evolutionary breaks. But machines can kind of leapfrog over the limitations of natural selection. By creating advanced robots, humans have invented a new kind of being, one that can theoretically sense a far greater range of stimuli.

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Are Avocados Toast? May 24, 2018

Show notes

This storyoriginally appeared on Gristand is part of theClimate Deskcollaboration. Chris Sayer pushed his way through avocado branches and grasped a denuded limb. It was stained black, as if someone had ladled tar over its bark. In February, the temperature had dropped below freezing for three hours, killing the limb. The thick leaves had shriveled and fallen away, exposing the green avocados, which then burned in the sun.

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This Robotic Pollinator Is Like a Huge Bee With Wheels and an Arm May 24, 2018

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You like eating, yes? Apples, oranges, berries? For these foods we can thank bees and their extraordinary pollinating powers. Unfortunately, to show our appreciation, humans are killing off bees in staggering numbers—destroying their habitats and poisoning them with pesticides. And at the same time, our population is skyrocketing, which means if we can't get our act together, we have to somehow feed more people with fewer pollinators. Well, living pollinators, that is.

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Scientists Are Using AI to Painstakingly Assemble Single Atoms May 23, 2018

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Forget ruby-encrusted swords or diamond-tipped chainsaws. The scanning probe microscope is, quite literally, the sharpest object ever made. Hidden under its bulky silver exterior is a thin metal wire, as fine as a human hair. And at one end, its point tapers to the width of a single atom. Scientists wield the wire not as a weapon, but as an intricate paintbrush—using its needlelike tip to position single atoms on a tiny semiconductor canvas.

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America's Fastest-Growing Urban Area Has a Water Problem May 23, 2018

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This storyoriginally appeared on CityLaband is part of theClimate Deskcollaboration. When Latter-day Saint migrants arrived in Utah in 1847, a verse in Isaiah served as consolation to them in the dessicated landscape: “The wilderness and the solitary place shall be glad for them; and the desert shall rejoice, and blossom as the rose.” Lately, the desert has blossomed nowhere more than the St. George area, in the state’s southern reaches.

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A New Look Inside Theranos’ Dysfunctional Corporate Culture May 22, 2018

Show notes

Alan Beam was sitting in his office reviewing lab reports when Theranos CEO and founder Elizabeth Holmes poked her head in and asked him to follow her. She wanted to show him something. They stepped outside the lab into an area of open office space where other employees had gathered. At her signal, a technician pricked a volunteer’s finger, then applied a transparent plastic implement shaped like a miniature rocket to the blood oozing from it. This was the Theranos sample collection device.

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The 6-Foot Chinese Giant Salamander Is in Serious Trouble May 22, 2018

Show notes

The 6-foot-long, 140-pound Chinese giant salamander is a being that defies belief—and seemingly the laws of the physical universe. It’s the largest amphibian on the planet, a gargantuan (though harmless) beast that rests on river-bottoms hoovering up fish. Once it grows big enough, not many critters dare touch it—save for, of course, humans. Particularly the conservationists who are working to save the creature.

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