Lifestyle
Forget flowers: These ancient plants attract pollinators by getting hot
Beetles (Rhopalotria furfuracea) visit a male cone of the cycad plant Zamia furfuracea, whose cones produce heat during pollination.
Michael Calonje
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Michael Calonje
Some of the earliest plants attracted pollinators by producing heat that made these plants glow with infrared light, according to a new set of experiments.
The work, published in the journal Science, suggests that long before brightly colored flowers evolved, these ancient plants would metabolically rev themselves up when they had pollen at the ready. Nocturnal insects such as beetles could then see that heat from afar and home in on the target.
These heat-producing plants, called cycads, exist today in tropical forests around the world, although they’re one of the most endangered plant groups.
“Some people call them dinosaur plants because they were much more dominant when the dinosaurs were around,” says Wendy Valencia-Montoya, a cycad expert at Harvard University.
Fossils from over 200 million years ago, compared to cycads that exist today, show that “the plants look exactly the same,” she says. “So they haven’t changed much in hundreds of millions of years.”
They’re related to pines, and male and female plants each produce fleshy, pine-cone-like structures that contain the pollen and the seeds. “That’s something very unique among this group of ancient plants,” says Valencia-Montoya, who says these are the oldest known plants that have pollen.

A couple of centuries ago, botanists noticed that these plants produced heat in their reproductive structures. Compared to the ambient air temperature, they can be hotter by 15 to 25 degrees Fahrenheit, or even more.
“We think of producing heat as something that mammals do, or birds do, but in fact, plants can do it too,” she says, although it’s not common in the plant world and takes a lot of energy.
In these plants, the heat was thought to be a byproduct of metabolic processes. Or, maybe the heat volatilized the scent of the plant, much like plugging an air freshener into an electrical outlet to generate heat that sends scent around a room. Research done in the last couple of decades has shown that male and female cones heat up at slightly different times, which could send pollinators moving from one cone to the other.
To try to understand more about what was going on, Valencia-Montoya and her colleagues painted some pollinating beetles with fluorescent markers to watch when the beetles went to the plant. And they found that the beetles were clearly going to the plant cones when they heated up.
This thermal image shows two male cycad cones releasing pollen. This plant’s cones heat up during pollen-release.
Wendy Valencia-Montoya
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Wendy Valencia-Montoya
To decouple the heat from other potential signals that these plants produce, like scent and humidity, her team used 3-D printing to make some simulated pollen cones. These fake plant structures were hollow inside, and got filled up with heated sand.
The fake cones glowed in the infrared much like real plants. “It was quite striking, when we saw it in the field,” says Valencia-Montoya, who says the fake plants were deployed outside at the Montgomery Botanical Center in Coral Gables, Florida.
Using these fake plants, the researchers figured out a couple of tricks to see if insects were attracted to the infrared glow, rather than the tactile sensation of heat itself. For example, in one experiment, they wrapped the cone with plastic wrap that is transparent to infrared light. Insects could see the infrared light but not get close enough to the cone to actually feel the heat.

What they found is that the infrared glow, by itself, was enough to attract hundreds of pollinating beetles.
And when they looked at those beetles, they found that they have specialized antennae that have evolved to detect slight differences in temperature — similar to the heat-sensing receptors used by snakes to detect prey.
What’s more, it turns out that the beetles’ antennae seem to be tuned to the exact temperature range deployed by their host plant, since different beetle species frequent different cycad species.
“Infrared radiation is perhaps the oldest discovered pollination signal,” says Nicholas Bellono of Harvard University, one of the authors of the new study.
Back when plants first evolved pollen, the insects that were around were nocturnal and had poor vision, says Valencia-Montoya. “So it makes a lot of sense that a signal like heat was guiding them.”
But as new groups emerged that were active in the day and had better vision, like butterflies and bees, “it makes more sense for plants to change their signaling strategy to also tap into the sensory systems of these more recent pollinators,” she says, adding that in evolution, there’s a constant dance back and forth between plants and their pollinators. Once color became a possible signal, flowering plants had an immense range of color combinations at their disposal, allowing them to rapidly diversify.
These researchers used “a powerhouse of techniques” to prove that the temperature of cycad’s heat-producing cones is intimately related to attracting pollinators, and that this association is ancient, says Roger Seymour, with the University of Adelaide in Australia, who wasn’t part of the research team: “This is an important contribution.”
Seymour thinks that heat could have more than one role, however, and the chance for a warm-up may be a bonus for beetles that require high body temperatures for activity. “Heat can be a direct energy reward to insect pollinators which may remain inside a thermogenic flower for much longer than insects visiting non-thermogenic species,” he says.
Irene Terry at Tthe University of Utah, an ecologist who specializes in cycads and their insect interactions but wasn’t part of this research team, says it’s only been relatively recently that people realized these ancient plants even had pollinators, rather than just spreading their pollen with the wind.
Particular odorants seem to be important pollinator attractants, she says, noting that these plants can smell like everything from bubblegum to bell peppers. Still, this study shows “in the most beautiful way” that infrared is also key.
“I was not surprised at all that infrared was involved,” says Terry, given that other insects like mosquitoes use infrared to find their way to a target. “There’s a range of things that insects can see that we don’t.”
Imagine, says Bellono, being a prehistoric beetle trying to navigate the darkened environment in the early evening, and seeing various plants start to glow red.
“The infrared is an entirely different world that we don’t experience,” he says. “I think that’s a cool thing to think about, going back in time, that this signal was around when the dinosaurs were there, long before us. And the beetles still use it to this day and are still experiencing that world.”
Lifestyle
If you loved ‘Sinners,’ here’s what to watch next
Michael B. Jordan plays twin brothers Smoke and Stack in Sinners.
Warner Bros. Pictures
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Warner Bros. Pictures
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:
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:
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.
Lifestyle
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.”
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.
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.
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.
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.
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.
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.
Lifestyle
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
Andrew Limbong/NPR
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Andrew Limbong/NPR
“There’s a presence here,” Clifton House Executive Director Joël Díaz told me. “There’s a presence here that sits at attention.”
Sometimes, rooms where famous writers worked can be places of ineffable magic. Other times, they can just be rooms.
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?

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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