Space Graffiti n. Objects placed in orbit for the sole purpose of being seen from Earth. In January a company called Rocket Lab secretly added an extra point of light to the night sky. Dubbed the Humanity Star, it was a faceted carbon-fiber sphere parked in low Earth orbit, designed to twinkle as it caught the sun’s rays, thus creating a “shared experience for everyone on the planet.” Astronomers were not amused. Learn about your ad choices: dovetail.prx.org/ad-choices...
Jul 23, 2018•2 min
Inside a sealed clean room near Toulouse, France, Maurice Sylvestre points out something called SuperCam. Tall, with square-frame glasses, a corduroy jacket and a full head of brown hair, he resembles a mid-1980s version of actor Michael Caine, if Caine were an astrophysicist (and French). But right now it's hard to catch the resemblance: Sylvestre is outfitted in Tyvex and hairnets, necessary to keep out dust, skin particles, and dirt that could mar the super-smooth surface of his device. Learn...
Jul 20, 2018•5 min
One day humans will have a permanent presence on the moon. Right? One day it's going to happen. So, how are we going to live on the moon? And maybe a more important question—how are we going to move around there? In preparation for our lunar colony, let me look at three motions that we could do on the moon: jumping, running, and turning. Let me note that this analysis is inspired by Andy Weir's recent novel Artemis. Learn about your ad choices: dovetail.prx.org/ad-choices...
Jul 20, 2018•8 min
This storyoriginally appeared on Gristand is part of theClimate Deskcollaboration. You probably didn’t give much thought to how exactly you loaded this webpage. Maybe you clicked a link from Twitter or Facebook and presto, this article popped up on your screen. The internet seems magical and intangible sometimes. But the reality is, you rely on physical, concrete objects—like giant data centers and miles of underground cables—to stay connected. Learn about your ad choices: dovetail.prx.org/ad-ch...
Jul 19, 2018•3 min
The drones rise all at once, 30 strong, the domes of light on their undercarriages glowing 30 different hues—like luminescent candy sprinkles against the gray, dusky sky. Then they pause, suspended in the air. And after a couple seconds of hovering, they begin to move as one. As the newly-formed flock migrates, its members’ luminous underbellies all change to the same color: green. They've decided to head east. Learn about your ad choices: dovetail.prx.org/ad-choices...
Jul 19, 2018•7 min
When an iceberg breaks off from a glacier, it can drift for thousands of miles, traveling freely across the open ocean. But last week, an iceberg’s journey was interrupted when it got stuck on a shallow part of the seafloor along Greenland’s western coast. In other words, the iceberg was grounded—and it had lodged itself right beside the small island village of Innaarsuit. Learn about your ad choices: dovetail.prx.org/ad-choices
Jul 18, 2018•4 min
This storyoriginally appeared on CityLaband is part of theClimate Deskcollaboration. Until she moved to Fresno, California in 2003, Janet DietzKamei had never experienced asthma. But after just a few years in a city notorious for its filthy air—the American Lung Association lists it in the five worst US cities for air quality—DietzKamei found herself in the emergency room struggling to breathe. Learn about your ad choices: dovetail.prx.org/ad-choices...
Jul 18, 2018•7 min
This storyoriginally appeared on Gristand is part of theClimate Deskcollaboration. On a hot summer day in New York City last July, Ajohntae Dixon was studying at home when he began struggling to breathe. With no air conditioning in his apartment, the temperature inside surged, and the 15-year-old’s gasping quickly progressed into a full-blown asthma attack under the oppressive heat. He took his inhaler and then tried his nebulizer, but he was still fighting for air. Learn about your ad choices: ...
Jul 17, 2018•15 min
Sometimes a search for one thing presents the chance to look for something else. If you're like me, that something else is usually something small: Rummaging in the couch cushions for the TV remote might prompt you to dig for spare change. Two birds, one stone, etc. But if you're astronomer Scott Sheppard, the second bird occasionally turns out to be a doozy. Or several doozies. Learn about your ad choices: dovetail.prx.org/ad-choices
Jul 17, 2018•7 min
There are so many real-world physics problems involved in running. Lots of physicists have been inspired, for instance, by the crazy-fast speeds of Usain Bolt. Just take a look at this paper, "On the performance of Usain Bolt in the 100 m sprint" (European Journal of Physics), in which the authors examine the motion of Usain in one of his sprints. But what if you want to look at more . Learn about your ad choices: dovetail.prx.org/ad-choices...
Jul 17, 2018•6 min
When Piraye Beim went to her first OBGYN visit more than two decades ago, she got a pap smear and an earful about avoiding STDs. She didn’t learn in that visit that the fact she was having excruciating periods as a teenager might mean she could have trouble conceiving later in life. She definitely didn’t hear the words “reproductive health” come out of her doctor’s mouth. Like nearly 10 percent of women, Beim has lived with endometriosis her whole adult life. Learn about your ad choices: dovetai...
Jul 16, 2018•7 min
Imagine, for a moment, the simple act of picking up a playing card from a table. You have a couple of options: Maybe you jam your fingernail under it for leverage, or drag it over the edge of the table. Now imagine a robot trying to do the same thing. Tricky: Most robots don’t have fingernails, or friction-facilitating fingerpads that perfectly mimic ours. So many of these delicate manipulations continue to escape robotic control. Learn about your ad choices: dovetail.prx.org/ad-choices...
Jul 16, 2018•6 min
By the end of June, Kajsa Fernström Nåtby was homesick. The native Swede had just finished a 5-month internship with her country’s diplomatic office near the UN headquarters in Manhattan, darting between debates on migration and ocean plastic. Now, her parents were pleading for her to hop on an 8-hour flight across the Atlantic and rush home. But Fernström Nåtby had a different idea. Learn about your ad choices: dovetail.prx.org/ad-choices...
Jul 13, 2018•6 min
In 1911 and 1912, an Austrian physicist named Victor Hess took to the sky in a series of risky hot air balloon trips—for science. Down on land, researchers had been registering signals of mysterious energetic particles on their instruments. They didn’t know what the signals were or where they came from. So in progressively thinning air, more than three miles off the ground, Hess performed experiments to figure out if the particles came from above or below. Learn about your ad choices: dovetail.p...
Jul 13, 2018•7 min
Inside an 80-foot-tall chamber on Lockheed Martin’s Denver-area campus, backgrounded by red-rock ridges, stands a hulking spacecraft. You have to crane your neck to see the top of the apparatus. At the bottom, wires spew from a porthole to snake up and down and away. The cylindrical structure flows into a duller, funnel-like cone, which tapers into a tower with rocket nozzles. Next to it, the blue scaffolds of an indoor crane resemble a launchpad gantry. Learn about your ad choices: dovetail.prx...
Jul 12, 2018•7 min
This much is obvious: What the world needs now is less fake news. In general, sure, but particularly on the planet's leading source of information: Facebook. The thing is, to separate the informational wheat from the disinformational chaffe, what you actually need is a better definition of fake news. And that's… well… less obvious. "What does it mean, exactly? It's not always clear. Learn about your ad choices: dovetail.prx.org/ad-choices...
Jul 12, 2018•7 min
Turbulence, the splintering of smooth streams of fluid into chaotic vortices, doesn’t just make for bumpy plane rides. It also throws a wrench into the very mathematics used to describe atmospheres, oceans and plumbing. Turbulence is the reason why the Navier-Stokes equations—the laws that govern fluid flow—are so famously hard that whoever proves whether or not they always work will win a million dollars from the Clay Mathematics Institute. Learn about your ad choices: dovetail.prx.org/ad-choic...
Jul 11, 2018•10 min
Does it matter if you put a video camera near your magnetic compass that is used for navigation? The theoretical answer is "yes." But the practical answer? "Probably not." Now for a detailed explanation! How does a magnetic compass work? So, the Earth is like a giant magnet, just like that bar magnet that picks up paperclips. For this giant Earth-magnet, the north end is in Antartica and the south end is in the Arctic. Yes, the North Pole of the Earth is the south pole of the Earth's magnet. Lea...
Jul 11, 2018•6 min
Space: final frontier or ultimate tourist destination? Possibly both—provided you have the cash. Already, you can buy tickets for (as-yet-unscheduled) flights aboard SpaceShipTwo, the crew vehicle developed by Richard Branson’s Virgin Galactic. And at a NewSpace conference in Seattle last month, Blue Origin—helmed by Amazon founder Jeff Bezos—announced that it has plans to sell tickets to wannabe space tourists as early as next year. Learn about your ad choices: dovetail.prx.org/ad-choices...
Jul 10, 2018•6 min
The robot apocalypse is nigh. Boston Dynamics’ robots are doing backflips and opening doors for their friends. Oh, and these 7-foot-long robot arms can lift 500 pounds each, which means they could theoretically crush, like, six humans at once. The robot apocalypse is also laughable. Watch a robot attempt a task it hasn’t been explicitly trained to do, and it’ll fall flat on its face or just give up and catch on fire. Learn about your ad choices: dovetail.prx.org/ad-choices...
Jul 10, 2018•6 min
This storyoriginally appeared on Gristand is part of theClimate Deskcollaboration. Sometimes the most vicious fights occur over the smallest differences. Brutal battles have pitted Catholics that kneel in prayer against Protestant sects that stood before the same God. Learn about your ad choices: dovetail.prx.org/ad-choices
Jul 09, 2018•14 min
The best questions are always the ones that don't have a single clear answer. In my physics classes, I like to present students with problems that can promote a lively discussion—and to do that, they have to have multiple answers that could possibly make sense. (And they shouldn't involve lots of math, otherwise my students will just get hung up on the calculations.) Here is a version of one of these great questions; it's truly a classic. A human (person A below) has two baseballs. Learn about y...
Jul 09, 2018•5 min
Anyone who travels to rocket launches regularly knows three things: Bring snacks, wear sunscreen, and don't book your flight home for the night after the scheduled takeoff. Chances are, you'll either miss the launch or your plane. A company called Rocket Lab provides no exception. The commercial space organization hopes to send up rockets just the right size for smaller satellites. But of three total launch attempts, it has delayed or scrubbed all of them. Learn about your ad choices: dovetail.p...
Jul 06, 2018•6 min
NASA has to start protecting planets better. The international treaty governing space—there is one—and the laws and regulations that follow it date back to the Cold War. That was before scientists knew about the oceans on moons around other planets, before they knew about how tough microorganisms get here on Earth (and so maybe in space too?), before they started planning experiments to look for life on Mars, and before tech billionaires started threatening to send people to space. Learn about y...
Jul 06, 2018•6 min
Falcon Heavy is about to take off in a big way. Just a few months after its thrilling debut, SpaceX’s heavy-lift rocket is back in the headlines. Not for sending another cherry-red Tesla into space, but for gaining some major accolades from the Air Force. In a surprising move, and after just one flight, the Air Force announced it has certified Falcon Heavy for military launches and awarded the vehicle its first highly coveted launch contract: the AFSPC-52 mission. Learn about your ad choices: do...
Jul 05, 2018•6 min
When Rick Ostfeld gets bitten by a tick, he knows right away. After decades studying tick-borne diseases as an ecologist at the Cary Institute of Ecosystem Studies in Millbrook, New York, Ostfeld has been bitten more than 100 times, and his body now reacts to tick saliva with an intense burning sensation. He’s an exception. Learn about your ad choices: dovetail.prx.org/ad-choices
Jul 05, 2018•7 min
Can you launch fireworks from your drone? OK, before I answer this question I have my own question: Why? Guys, why would you want to put fireworks on your drone? I mean, I get it. Fireworks are cool and drones are cool. Therefore fireworks on drones are cool to the power of two, I guess. But really, it's probably not a good idea to manifest your American pride with this particular version of pyrotechnics. Learn about your ad choices: dovetail.prx.org/ad-choices...
Jul 04, 2018•5 min
The dogs will lose their minds. They always do. Every Fourth of July in America, as children stay up past their bedtime to watch colors explode in the sky and adults sit on the back of pickup trucks drinking beer and marveling at a pyrotechnic technology 12 centuries old, pets across the country panic with every boom. Sound phobias are very common for dogs—and cats—making this holiday a nightmare for millions of animals. Learn about your ad choices: dovetail.prx.org/ad-choices...
Jul 04, 2018•7 min
The giant hogweed is hard to miss. The monstrous plant towers up to 15 feet tall, with a crown of white flowers the size of an umbrella. They burst into bloom between the last week of June and the first week of July—just in time to be the perfect dramatic backdrop to red-white-and-blue-themed parties. But whatever you do, don’t touch it. The giant hogweed’s toxic sap could give you third-degree burns if you don’t get out of the sun and wash it off immediately. Learn about your ad choices: doveta...
Jul 03, 2018•5 min
Having grown up in Tucson, Arizona, one of the sunniest cities in the world, I consider myself well-versed in the carcinogenic threat of UV exposure, the skin-sparing sanctity of shade, and the redeeming qualities of the sartorial atrocity that is the broad-brimmed hat. I am also a compulsive sunscreensplainer. Learn about your ad choices: dovetail.prx.org/ad-choices
Jul 03, 2018•12 min
