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Can you make music from Joshua trees — or is that wild science? Yes.

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Can you make music from Joshua trees — or is that wild science? Yes.

Artist Scott Kildall waves his microcontroller over a Joshua tree, recording wavelengths of light that are not perceptible by humans.

Carlos Jaramillo for NPR


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The artist Scott Kildall is waving his hand over the contours of a Joshua tree, just inches from its spiky green, bayonet-like leaves.

“If I get too close to it, it will prick me and draw blood,” he says. “And it’s done that before.”

In his palm, he has a microcontroller — just about the size of a credit card. It’s got a few wires sticking out, and an infrared sensor, which picks up wavelengths of light just beyond what the human eye can perceive.

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“It’s kind of like magic,” Kildall says. “And the magic is just revealing something that’s right beyond our levels of perception.”

The magic is part of Kildall’s latest sound installation — a work he calls Infrared Reflections. He developed the piece as an artist-in-residence at Joshua Tree National Park this spring, and it transforms near-infrared light bouncing off the iconic scraggly yuccas into a shimmering mosaic of otherworldly music — essentially turning the Joshua tree into an instrument.

Kildall is neither a computer scientist nor a musician, though he does play the ukulele. This artwork relies on both disciplines, as Kildall needs to build sensors, route their data to a computer, process and smooth that data, and convert it all into something beautiful for the ear.

“With art and technology, you have to constantly think about wearing multiple hats. Are you an IT person? Are you an artist? And you have to be able to troubleshoot on the fly,” he says.

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The installation relies on a fundamental interplay between the sun and the Joshua tree. When sunlight hits the plant, cells in its healthy leaves soak up lots of red and blue light, and reflect back most of the green – which is why the clusters of piercing leaves at the end of the Joshua tree’s branches appear green to the human eye. (It’s also why most plants on Earth appear green to us.)

Spiky Joshua trees north of Los Angeles.

Spiky Joshua trees grow in Arthur B. Ripley Desert Woodland State Park, north of Los Angeles.

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But other types of light rain down on the Joshua tree too, including wavelengths we can’t see, like near-infrared light. The plant’s shaggy, grayish-brown bark doesn’t reflect much of that infrared light, but its healthy leaves — packed with compounds like water, carbohydrates and defense chemicals — reflect much more. And that’s exactly what Kildall sees as he passes his sensor from the yucca’s dead bark to its green, leafy buds.

“Beyond our perceptions lies a whole realm of invisible data,” he explains. “And so what I do is I find some sort of invisible phenomena such as water quality or air quality or infrared light reflection, and then map that data into sounds, so that we can hear that data.”

That technique is known as sonification, and Kildall has previously designed installations that sonify water flow in trees, or tap into the electrical signals of mushrooms. Infrared Reflections follows in that vein, but it’s much more site-specific — it’s meant to be played on the Joshua tree, which is endemic to the Mojave Desert.

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Kildall, wearing a baseball cap, black t-shirt and gray shorts, carries a speaker and a bag of equipment into the state park, which is largely desert-like.

Kildall needs a speaker and a bag of equipment on site to make his music.

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With that in mind, earlier today Kildall lugged his laptop, a box of electronics and a giant speaker into a field full of Joshua trees at the Arthur B. Ripley Desert Woodland State Park, north of Los Angeles.

Gusts of wind scream through the high desert here, and Kildall eyes individual Joshua trees with the eagerness of a kid at Guitar Center, ready to pick out an axe.

“I see one Joshua tree that’s about a hundred feet away that is moving a little bit in the wind and has multiple leafy sections and bark sections,” he says. “And that one really looks like it is asking to be sonified.”

A large speaker sits on the ground next to several Joshua trees.

Kildall’s speaker sits next to several Joshua trees.

Carlos Jaramillo for NPR

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After a short walk, Kildall sets down the speaker and begins fiddling with his laptop. It’s perched on a camp chair, in direct sun, and refuses to boot up — a reminder, Kildall says, of how preparing for a field installation is like planning a NASA space mission (though with non-lethal stakes.)

“You want to reduce the number of points of failure. And so with the system I have, I have backup electronics, I only have one laptop. So that’s the only point of failure that I’m really worried about.”

But not to fear. The machine soon boots up, along with a local Wi-Fi network — which connects the small infrared sensor to the computer — and Kildall is ready to rock.

A view of Joshua trees at Arthur B. Ripley Desert Woodland State Park.

A view of Joshua trees at Arthur B. Ripley Desert Woodland State Park.

Carlos Jaramillo for NPR

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An infrared view of Joshua trees at Arthur B. Ripley Desert Woodland State Park, where the trees and other plants are reds and oranges, the horizon line is yellow to green and the sky is a dark blue.

Here’s the same landscape viewed through a thermal infrared camera. It captures a different part of the infrared spectrum from what Kildall is picking up with his sensor, but gives a sense of how these plants appear differently when viewed at different wavelengths of light.

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As he caresses the air just above the tree, the yowling of a theremin rises and falls from the speaker, lending an eerie soundtrack to the already alien-looking landscape. A few hikers walk by, but seem unphased by the guy performing reiki on a Joshua tree. The high desert is known for its eccentrics, after all.

Kildall has designed three more “instruments” to be played like this, along with the theremin sound.

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His favorite combines the drone of a theremin with spiraling arpeggios.

Another sounds more like haunting electric guitars, reverberating in a cathedral.

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The final sound is more pared-back and simple — resembling a kid plinking at the piano.

“In some ways, it feels a little bit more direct and accessible because we all kind of understand how to press notes randomly on the piano,” Kildall explains. “And as I move the sensor over these sort of leafy spots in the sun, those will produce a higher pitch on the piano.”

As he slides the sensor further down the branch, to the bark, the notes get lower and lower, moving deeper into the bass clef.

Left: A close up photo of Scott Kildall's hand holding his homemade device in front of a Joshua tree. Right: A portrait of Kildall wearing a black hat, black glasses and a black t-shirt.

Kildall holds his device a few inches above a spiky Joshua tree to avoid getting pricked.

Carlos Jaramillo for NPR

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It’s a fascinating way to make music. The infrared-sensing technology at the heart of the work also happens to be something scientists have employed for decades.

“From our aircraft or satellites, we use it to separate the living vegetation from the dead vegetation,” says Greg Asner of Arizona State University in Hawaii. “That’s very important in a grassland — is the grassland dry and ready to go up in smoke in a fire, or is it wet and green and living? And so we can translate that to fire fuel load for grasslands.”

An infrared view of Joshua trees, where the trees appear pink with spiky rainbow edges against a sky that has a rainbow gradient.

Joshua trees viewed through a thermal infrared camera.

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Asner has also soared above the Amazon basin, measuring infrared signals from a plane — which allows him to tease out individual tree species, based on the fingerprints of infrared light that bounce off the trees.

“When I fly over a tropical rainforest with the infrared sensors, the maps literally are like Willy-Wonka-candy-store-style variation. They are amazing to look at,” he says.

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“So there’s this enormous diversity of plants when you look at them in infrared light. And unfortunately, a lot of people just see them as green because that’s all we can see with our limited eyesight. There’s much more variety out there. And it’s a very beautiful world when you look at it in the infrared.”

Asner says he’s thrilled to see artists now experimenting with the same technology.

Left: A close up view of a Joshua tree. Right: An infrared view of Kildall holding his device in front of a Joshua tree. The infrared image shows the plant as mostly yellow and orange, Kildall's hand appears red and pink, his device appears as a rainbow and the sky appears dark navy blue.

Left: A close up view of a Joshua tree. Right: A thermal infrared view of Kildall holding his device in front of a Joshua tree.

Carlos Jaramillo for NPR


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“Our studies for decades now have been stuck in the halls of science. And this will help translate what we have come to understand, utilize, love as scientists — it’s going to translate it to a much wider audience.”

Kildall says, in some sense, that’s his goal.

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“One of the things I like to do is to engage people with nature and issues of climate change and issues of ecology through means other than science articles,” he says. “Science articles are great. I read them all the time. However, they don’t engage people on a more visceral storytelling level, as artwork does.”

And though this installation was conceived and developed with the Joshua tree at its center, it could work with the infrared reflections of other plants, if Kildall calibrates his code — which is a good thing, since Kildall calls San Francisco home.

“There aren’t any Joshua trees in San Francisco, so I might have to go to Golden Gate Park and see what I come up with.”

Lifestyle

If you loved ‘Sinners,’ here’s what to watch next

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If you loved ‘Sinners,’ here’s what to watch next

Michael B. Jordan plays twin brothers Smoke and Stack in Sinners.

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Warner Bros. Pictures

What to watch if you loved…

Ryan Coogler’s supernatural horror stars Michael B. Jordan playing twin brothers who open a 1930s juke joint in Mississippi. Opening night does not go as planned when vampires appear outside. “In a straightforward metaphor for all the ways Black culture has been co-opted by whiteness, the raucous pleasures and sonic beauty of the juke joint attract the interest of a trio of demons … they wish to literally leech off of the talents and energy of Black folks,” writes critic Aisha Harris. The film made history with a record 16 Academy Award nominations.

We asked our NPR audience: What movie would you recommend to someone who loved Sinners? Here’s what you told us:

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Near Dark (1987)
Directed by Kathryn Bigelow; starring Adrian Pasdar, Jenny Wright, Lance Henriksen
If you want another cool vampire movie with Western kind of vibes, check out Kathryn Bigelow’s Near Dark — super underseen and kind of hard to find, but really gritty and sexy and another very different take on what you might think is a genre that had been wrung dry. – Maggie Grossman, Chicago, Ill.

30 Days of Night (2007)
Directed by David Slade; starring Josh Hartnett, Melissa George, Danny Huston
It follows a group of people in a small Alaskan town as they struggle to survive an invasion of vampires who have taken advantage of the month-long absence of the sun. Both this and Sinners revolve around a vampire takeover and the people’s fight to outlast the “night.” – Nathan Strzelewicz, DeWitt, Mich.

The Wailing (2016)
Directed by Na Hong-jin; starring Kwak Do-won, Hwang Jung-min, Chun Woo-hee, Jun Kunimura
In this South Korean supernatural horror film, a mysterious illness causes people in a quiet rural village to become violent and murderous. A local police officer investigates while trying to save his daughter, who begins showing the same disturbing symptoms. The film blends folk horror, religion, and psychological dread, exploring themes of faith, evil, and moral weakness. Like Sinners, it centers on a supernatural force corrupting a close-knit community, builds slow-burning tension, and examines spiritual conflict and human frailty. – Amy Merke, Bronx, N.Y.

Fréwaka (2024)
Directed by Aislinn Clarke; starring Bríd Ní Neachtain, Clare Monnelly, Aleksandra Bystrzhitskaya
In this Irish folk horror film, a home care worker, Shoo, is assigned to stay with an elderly woman who’s convinced she’s under siege by malevolent fairies. Like Sinners, Fréwaka blends folk traditions and social commentary with horror. The social failures Shoo copes with (untreated mental health issues, religious abuse) are just as frightening as the supernatural forces. – Kerrin Smith, Baltimore, Md.

And a bonus pick from our critic:

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Ma Rainey’s Black Bottom (2020)
Directed by George C. Wolfe; starring Viola Davis, Chadwick Boseman, Glynn Turman
This is an adaptation of August Wilson’s play about a legendary blues singer (Viola Davis) muscling through a recording session with white producers who want to control her music. Chadwick Boseman’s blistering in his final role. – Bob Mondello, NPR movie critic

Carly Rubin and Ivy Buck contributed to this project. It was edited by Clare Lombardo.

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Solar energy for renters has taken off in 10 states. Not in California

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Solar energy for renters has taken off in 10 states. Not in California

The tiny town of West Goshen, Calif., was exactly the kind of place that community solar was designed for.

Near Visalia, most of its 500 residents live in mobile homes, where companies won’t install rooftop panels without a solid foundation. And until recently, they used propane for heating and cooking, with price fluctuations in the winter posing hardships for low-income families.

Community solar, in which residents get a discount on their bills for subscribing as a group to small solar arrays nearby, was designed to help low-income residents, apartment dwellers, renters and others who can’t put panels on their own roofs.

Over the last 11 years, New York, Maine, Minnesota, Massachusetts and other states have built thriving community solar programs. But California has built, at most, only 34 projects since 2015, and experts say that’s a generous accounting.

“We’ve had community solar for a dozen years, and it simply has not produced anything of scale and anything of note,” said Derek Chernow, director of Californians for Local, Affordable Solar and Storage, a developer trade group that’s pushing to get a more robust program off the ground. “Projects don’t pencil out.”

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The West Goshen residents were among the lucky few, becoming part of a community solar project in 2024.

“It has kind of allowed us to kind of breathe a little bit,” said resident and community organizer Melinda Metheney. Her bill has dropped by about $300 in the summer months, thanks to the 20% community solar discount, stacked with other low-income discounts and clean energy incentives, she said.

West Goshen’s panels sit about 10 miles out of town, in a field surrounded by farms. Energy and climate experts agree California must add much more clean energy to its grid, some 6 gigawatts by 2032, the California Public Utilities Commission said in a new plan last week.

Assemblymember Christopher M. Ward (D-San Diego), who in 2022 authored a bill to create a more effective community solar program, said the state needs to double its annual solar installation rate to reach that goal and is not on track to do that using only large utility-scale solar farms and individual rooftop arrays.

“We need mid-scale community solar,” he said.

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Aerial view of solar panels installed on top of Extra Space Storage in Pico Rivera

Energy and climate experts agree California must add much more clean energy to its grid, some 6 gigawatts by 2032, the California Public Utilities Commission said in a new plan last week. Above, solar panels at Extra Space Storage in Pico Rivera.

(Kayla Bartkowski / Los Angeles Times)

He and a coalition of environmental groups, solar developers and the Utility Reform Network, a ratepayer advocacy group, worked to put his 2022 law into effect. They coalesced around requiring utilities to pay community solar developers and customers for the electricity they feed to the grid using the same formula they use for people who install rooftop solar.

But in May 2024, the California Public Utilities Commission decided to go with a late-in-the-game proposal backed by the state’s investor-owned utilities to pay community solar at a lower rate.

The agency, along with its public advocate’s office, argued that crediting solar developers at the higher rate would raise bills for customers who don’t have solar, who would still have to shoulder the cost of grid maintenance. It’s similar to the argument they’ve made to cut incentives for rooftop solar.

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The new program relied on federal money, including the Biden administration’s Solar for All, to sweeten the deal for developers. But the utilities commission spent very little of the $250 million available under that grant before the Trump administration tried to claw it back last summer, and now it is held up in litigation.

At a legislative oversight hearing last week, Kerry Fleisher, the commission’s director of distributed energy resources, blamed the loss for the new program’s failure to launch.

“There’s been a tremendous amount of uncertainty in terms of the Solar for All funding that was intended to supplement this program,” Fleisher said. “That’s part of the reason why this has taken longer than normal.” She said the commission still plans to release a program in the next several months.

Ward, the San Diego lawmaker who wrote the community solar bill, called the program “fatally flawed” in an interview.

He’s now considering a bill to bring the community solar program more in line with what he initially envisioned — higher incentives, requirements for battery storage, and compliance with state law that mandates new houses be built with solar.

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A study last year funded by a solar trade group found that could save California’s electric system $6.5 billion over 20 years. But Ward’s effort to revive his program last year failed to pass the Assembly appropriations committee.

“All the other states in our country that have adopted similar community solar program models, they are working,” said Ward, adding that 22 states have programs comparable to the one solar advocates want in California. “The writing on the wall suggests that, exactly as we feared years ago, this was not the way to go.”

California Public Utilities Commission spokesperson Terrie Prosper called California “a leader in cost-effective, least-cost solar deployment overall compared to any other state,” in an emailed statement.

Under the commission’s definition, the state has brought on 34 projects, representing 235 megawatts of community solar. But studies from groups such as the Institute for Local Self-Reliance and Wood Mackenzie use different definitions for community solar, and they show California far behind at least 10 other states.

Meanwhile, advocates and developers involved in successful community solar projects in California say they were difficult to get off the ground.

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A view of homes in the Avocado Heights area of Los Angeles County

Homes in the Avocado Heights area of Los Angeles County are part of a community solar project.

(Kayla Bartkowski / Los Angeles Times)

One that came online in May in the unincorporated communities of Bassett and Avocado Heights in the San Gabriel Valley provides solar electricity to about 400 low-income residents. They get 20% discounts on their electric bills for subscribing to panels installed on two Extra Space Storage building rooftops in Pico Rivera.

Organizers said it took nearly five years to find the right location and comply with utility requirements. They also got a grant in addition to funding provided by the state utilities commission’s solar program.

It “would not have happened if it hadn’t been for the grant,” said Genaro Bugarin, a director at the Energy Coalition nonprofit that proposed and coordinated the project.

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Brandon Smithwood, vice president of policy at Dimension Energy, the developer for the project in West Goshen, said he still hopes to see a community solar program in California that compensates projects for the way they help out the grid.

“We’ve seen it can work, and we know what we have won’t work,” Smithwood said at the hearing.

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Mundane, magic, maybe both — a new book explores ‘The Writer’s Room’

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Mundane, magic, maybe both — a new book explores ‘The Writer’s Room’

There’s a three-story house in Baltimore that looks a bit imposing. You walk up the stone steps before even getting up to the porch, and then you enter the door and you’re greeted with a glass case of literary awards. It’s The Clifton House, formerly home of Lucille Clifton.

The National Book Award-winning poet lived there with her husband, Fred, starting in 1967 until the bank foreclosed on the house in 1980. Clifton’s daughter, Sidney Clifton, has since revived the house and turned it into a cultural hub, hosting artists, readings, workshops and more. But even during a February visit, in the mid-afternoon with no organized events on, the house feels full.

The corner of Lucille Clifton's bedroom, where she would wake up and write in the mornings

The corner of Lucille Clifton’s bedroom, where she would wake up and write in the mornings

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“There’s a presence here,” Clifton House Executive Director Joël Díaz told me. “There’s a presence here that sits at attention.”

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Sometimes, rooms where famous writers worked can be places of ineffable magic. Other times, they can just be rooms.

The Writer’s Room: The Hidden Worlds That Shape the Books We Love

Princeton University Press

Katie da Cunha Lewin is the author of the new book, The Writer’s Room: The Hidden Worlds That Shape the Books We Love, which explores the appeal of these rooms. Lewin is a big Virginia Woolf fan, and the very first place Lewin visited working on the book was Monk’s House — Woolf’s summer home in Sussex, England. On the way there, there were dreams of seeing Woolf’s desk, of retracing Woolf’s steps and imagining what her creative process would feel like. It turned out to be a bit of a disappointment for Lewin — everything interesting was behind glass, she said. Still, in the book Lewin writes about how she took a picture of the room and saved it on her phone, going back to check it and re-check it, “in the hope it would allow me some of its magic.”

Let’s be real, writing is a little boring. Unlike a band on fire in the recording studio, or a painter possessed in their studio, the visual image of a writer sitting at a desk click-clacking away at a keyboard or scribbling on a piece of paper isn’t particularly exciting. And yet, the myth of the writer’s room continues to enrapture us. You can head to Massachusetts to see where Louisa May Alcott wrote Little Women. Or go down to Florida to visit the home of Zora Neale Hurston. Or book a stay at the Scott & Zelda Fitzgerald Museum in Alabama, where the famous couple lived for a time. But what, exactly, is the draw?

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Lewin said in an interview that whenever she was at a book event or an author reading, an audience question about the writer’s writing space came up. And yes, some of this is basic fan-driven curiosity. But also “it started to occur to me that it was a central mystery about writing, as if writing is a magic thing that just happens rather than actually labor,” she said.

In a lot of ways, the book is a debunking of the myths we’re presented about writers in their rooms. She writes about the types of writers who couldn’t lock themselves in an office for hours on end, and instead had to find moments in-between to work on their art. She covers the writers who make a big show of their rooms, as a way to seem more writerly. She writes about writers who have had their homes and rooms preserved, versus the ones whose rooms have been lost to time and new real estate developments. The central argument of the book is that there is no magic formula to writing — that there is no daily to-do list to follow, no just-right office chair to buy in order to become a writer. You just have to write.

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