Science, Spoken

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Exploding Stars May Have Killed Off Prehistoric Predators Jan 23, 2019

Show notes

Even though Earth is floating in the void, it does not exist in a vacuum. The planet is constantly bombarded by stuff from space, including a daily deluge of micrometeorites and a shower of radiation from the sun and more-distant stars. Sometimes, things from space can maim or kill us, like the gargantuan asteroid that wiped out the dinosaurs.

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For Women Job Seekers, Networking Like a Man Isn't Enough Jan 22, 2019

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To get a great job, you’ve got to network—make contacts, know the right people. You know the drill. But a study out today in the Proceedings of the National Academy of Sciences suggests that the kind of networking that works best for men isn’t enough for women. Women need access to key kinds of information that men don’t. And how can they get it? From other women.

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3 Smart Things: The Hidden Lives of Liquids Jan 21, 2019

Show notes

1. Most substances make a clean break between their liquid and solid states. But liquid crystals straddle the boundary: They flow smoothly, like water, while maintaining a crystalline structure. A tiny jolt of electricity aligns the molecules in the same direction and allows them to rotate light—an effect you see when the pixels in your LCD television or smartphone flip on and off to form pretty images. 2.

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Space Billboards Are Just the Latest Orbital Stunt Jan 21, 2019

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In January 2018, Rocket Lab sent a surprise to orbit. Along with its normal payloads, the launch company deployed a shiny object it dubbed the Humanity Star—basically a 3-foot-wide disco ball. Its reflective surface would shine down on Earth’s inhabitants, visible to the naked eye for a few months. “No matter where you are in the world, or what is happening in your life, everyone will be able to see the Humanity Star in the night sky,” founder Peter Beck said in a statement.

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If Edible Insects Are the Future, We Should Talk About Poop Jan 18, 2019

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Two billion people can’t be wrong—at least, not about the nearly 2,000 species of insects that make for good eatin’ around the world. But nobody has to pitch you on the benefits of insectivory, right? Easier on the environment, full of weird nutrients, and whoa, check out that feed conversion ratio: It takes half as much food as you’d give to pigs and chickens and a twelfth as much as cattle to get the same amount of cricket protein on the far side of the abattoir.

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A Crocodile-Like Robot Helps Solve a 300-Million-Year Mystery Jan 18, 2019

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Nearly 300 million years ago, a curious creature called Orobates pabsti walked the land. Animals had just begun pulling themselves out of the water and exploring the big, dry world, and here was the plant-eating tetrapod Orobates, making its way on four legs. Paleontologists know it did so because one particularly well-preserved fossil has, well, four legs. And luckily enough, scientists also discovered fossilized footprints, or trackways, to match.

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To Prevent Wildfires, Treat Utilities Like Railroad Barons Jan 17, 2019

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Actions have consequences, as our parents likely told us as kids. But inaction has consequences, too. Life or death consequences, in the case of California’s new normal of massive, climate-change-driven wildfires. After a series of devastating fires over the last few years, critics have turned their ire toward PG&E, a utility that brings electricity to 5.4 million households and businesses in Northern California. Its equipment has been blamed for 17 of 21 major fires in 2017 alone.

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Is ’Oumuamua an Alien Spaceship? Sure! Except, No Jan 16, 2019

Show notes

When you wish upon a star (or an asteroid or a comet) you are wishing on plasma, ice, dust, rock, on an object that exists, for real, so far away and moving so fast that no living human will likely ever have direct contact with it. (Well, generally.) But you’re also wishing on a metaphor.

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Dark Matter Hunters Are Looking Inside Rocks for New Clues Jan 16, 2019

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In nearly two dozen underground laboratories scattered all over the earth, using vats of liquid or blocks of metal and semiconductors, scientists are looking for evidence of dark matter. Their experiments are getting more complicated, and the search is getting more precise, yet aside from a much-contested signal coming from a lab in Italy, nobody has found direct evidence of the mysterious material that is thought to make up 84 percent of the matter in the universe.

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Bio-Printers Are Churning out Living Fixes to Broken Spines Jan 15, 2019

Show notes

For doctors and medical researchers repairing the human body, a 3D printer has become almost as valuable as an x-ray machine, microscope, or a sharp scalpel. Bioengineers are using 3D printers to make more durable hip and knee joints, prosthetic limbs and, recently, to produce living tissue attached to a scaffold of printed material.

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