When three friends joined forces to launch the first Tender Greens a decade ago, they hadn’t even heard of the term “fast casual” yet. While the restaurant is now one of the leaders in that quick-and-healthy food space, they’re taking the slow, thoughtful approach to their sustainability practices.


In their early days, Tender Greens’ founders—Erik Oberholtzer, David Dressler and Matt Lyman—were working at the ritzy Santa Monica hotel Shutters on the Beach and growing tired of the fine-dining scene. They wanted to create a restaurant concept that had “all of the good stuff from luxury [establishments] without the luxury prices,” Oberholtzer says.

Perhaps the earliest seed of Tender Greens was planted in Oberholtzer’s mind during the decade he spent cooking in some of the top kitchens in San Francisco, including the acclaimed Chez Panisse in Berkeley. He describes Tender Greens as “very much a part of the Bay Area slow food point of view, with the Southern California fast-food efficiency.”

Yet Diners at Tender Greens might not realize the work that goes into hand-picking the seasonal ingredients for the restaurants; after all, they make the food look easy. The menu runs the gamut of simpler comfort fare like Southern fried chicken over a bed of butter lettuce to more high-end specials like maple-roasted pork belly paired with by a carrot-and-parsnip puree. Since their launch in 2006, the trio has opened 22 Tender Greens locations up and down California, following through with their highly conscientious philosophy about using hyperlocal and high-quality ingredients.

[quote position=”full” is_quote=”true”]It’s very much a part of the Bay Area slow food point of view, with the Southern California fast-food efficiency.[/quote]

One of the most fascinating aspects about Tender Greens’ maturity is how they’ve been working more and more with California farms that grow both indoors and outdoors through hydroponic systems. Oberholtzer does this for two reasons: “One is to offset the impact of the [California] drought—using hydroponics methods, you use about 90 percent less water than you would in the fields, which is huge when you think about power concerns with the climate,” he says. “Also, you can grow food in non-traditional areas [like] in warehouses, in vacant lots, in urban areas.”

That farming technology will likely come in handy when Tender Greens expands out of state—they’re considering opening in New York where there certainly won’t be the kind of optimal growing conditions that The Golden State gets to enjoy. Oberholtzer plans on growing produce indoors close to their future restaurants’ outposts, so they won’t have to ship fruits and vegetables across the country.

[quote position=”left” is_quote=”false”]By using mineral nutrients instead of soil, the towers can grow everything from leafy greens to strawberries and tomatoes.[/quote]

In fact, the company is so committed to the future of hydroponics that they had LA Urban Farms install aeroponic towers on several of their restaurant patios, next to where guests dine. These vertical gardens use 90 percent less water and 90 percent less space than conventional farming systems, according to LA Urban Farms. By using mineral nutrients instead of soil, the towers can grow everything from leafy greens to strawberries and tomatoes.

Oberholtzer also sees the aeroponic towers as an opportunity for guests and his team to participate in the conversation around hydroponics and the future of urban farming. Niels Thorlaksson, a partner at LA Urban Farms, says that he foresees hydroponic systems playing a bigger role in cities and communities throughout the world.

“We are going to have more people to feed in the future, and we’re not going to want to use as many resources as we do now,” Thorlaksson says. He believes doing this will help us “tackle some of these challenges together like using less water, using less space, and growing more nutritious crops.”

Oberholtzer and his team don’t skimp on the meat side of things either; they visit each of their poultry and beef farmers to make sure they’re comfortable with every step of the process. The cows are raised in open pastures and are antibiotic- and hormone-free. Tender Greens has also migrated 60 percent of their restaurants to using grass-fed beef. The chickens are fed non-GMO vegetarian feed, and a majority of the greens come from Scarborough Farms, a grower they trust in Oxnard, California.

In regards to their mission to serve hyperlocal produce, their Bay Area, San Diego and Orange County locations source from the local farms in their areas. Oberholtzer says that they try not to “hammer guests over the head” with information about their ingredients, but they are willing to share any details about their sourcing should diners want to know more. Thanks to their relationships with farmers, and being able to use their chain’s large size as leverage, Tender Greens has been able to better negotiate long-term deals on their core ingredients, so they can keep prices relatively low for the masses at their restaurants. (Most of the entrees at Tender Greens run around $11.50.) Since Scarborough Farms is not only a vendor, but also an investor in Tender Greens, the chain gets family discounts on produce.

[quote position=”full” is_quote=”true”]The vision was to create the kind of company we would want to work for, a place that felt like home.[/quote]

Last year, Shake Shack restaurateur Danny Meyer became a shareholder in Tender Greens, a serious boost to the company’s expansion efforts. Oberholtzer says his team sees Meyer as a “great guide and mentor as we grow to this next phase,” due to Meyer’s success in building his own brands. The guys are now eying their expansion to Texas and cities on the East Coast.

David Dressler, who instantly built a bond with Oberholtzer when they met at Shutters on the Beach over a decade ago, thinks back to what inspired them to launch Tender Greens.

“The vision was to create the kind of company we would want to work for, a place that felt like home, where there were no compromises and where everything that we did was based on a set of really determined values where everybody got to win,” he says.

It looks like they’re doing what they set out to do.

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  • The church fathers of early Christianity are showing their swag – on TikTok
    Photo credit: Holger Uwe Schmitt/Wikimedia Commons, CC BY-SASt. Paul is one of the many Christian figures whose paintings have made an appearance.

    It begins with the music: a late 1990s rap song. Then someone appears on screen, moving slowly into a pose that can only be called deeply, theatrically serious. Then comes the reveal: The video fades from the person into a medieval painting of a haloed man doing almost the exact same pose.

    Videos imitating “church fathers,” bishops and theologians who helped shape early Christianity have been popping up across social media since late 2025. Several versions have drawn hundreds of thousands of views.

    In part, they’re funny because of the incongruity: hoodies, bedrooms and phone cameras, suddenly paired with the solemn authority of saints. As an art historian who studies Christian images, I know that these types of paintings were carefully made to communicate holiness through visual cues like books, clothing, gestures and posture.

    But the humor also comes from how current they feel. These paintings may be centuries old, but the visual language is timeless. The raised hand, the open book, the severe gaze – they all communicate power. On TikTok or Instagram, a gesture once used to symbolize doctrine or wisdom starts to look like confidence, coolness, even swagger. The captions say as much: “They had swag fr,” one reads – for real.

    When the trend crossed my feed, I had to try it. What better way to show how these images work than by stepping into the pose?

    Church fathers

    Church fathers” were not “founders” in the simple sense, but foundational authorities: figures whose writings later Christians returned to when debating central questions about doctrine, scripture and religious life.

    Today’s social media trend uses the term more loosely. In addition to early Christian authors, many of the videos show later saints, monks, bishops and theologians, especially from Eastern Orthodox traditions. Online, “church father” becomes shorthand for religious authority itself.

    The paintings circulating online range from Eastern Orthodox icons to Western European Renaissance and Baroque paintings. In most cases, they were made long after the saints had died, so they don’t document what the men actually looked like.

    Instead, this style of art was meant to inspire awe, surrounding worshippers with a sense of religious authority. The saints’ books, rich vestments and formal poses were visible signs of holiness, symbolizing their learning, discipline and eloquence. Such images did not merely decorate sacred spaces; they taught viewers what closeness to divine truth – saintliness itself – could look like.

    Man of books and learning

    Several of the videos show Athanasius of Alexandria, a fourth-century bishop and theologian traditionally considered one of the church fathers.

    Painted by the Italian painter Domenichino in the 17th century, Athanasius stands in “contrapposto,” a pose inherited from classical art and common in Renaissance and Baroque painting. He leans back with his left shoulder, causing the right side of his body to project outward toward the viewer. The saint is dressed in a rich damask dalmatic – a long, wide-sleeved robe – over a white silk tunic.

    A bearded figure in an orange and brown robe gestures toward a large open book that he holds in one hand.
    An image of Athanasius by the 17th-century Italian artist Domenichino on the walls of the Santa Maria di Grottaferrata monastery outside Rome. The Web Gallery of Art

    Athanasius’ shifting stance and sweeping vestments create drama. They also direct attention to the open book he holds in one hand and points to with the other – a reminder of his place among the great teachers of the church. In religious art, books are not just props. They help the viewer recognize the figure as someone whose words matter.

    The Greek text on the page begins with the words “Whoever wishes to be saved”: the opening of the Athanasian Creed, a statement of Christian doctrine long associated with Athanasius. In the fourth century, he became famous for defending the idea that Christ was fully divine, a fiercely debated issue at the time.

    TikTokers recreating Athanasius’ pose today use a Bible or another thick volume, wielding the book with as much swagger as the saint himself.

    They lose the luxurious vestments, trading Athanasius’ sumptuous robes for hoodies and jeans. Yet their captions recognize the force of the look: Church fathers “knew the fit was hard,” one video says. The language is modern, but the point is old: Clothing, books and posture make authority visible.

    Charged with meaning

    Another star in the videos is Gregory Palamas, a 14th-century Byzantine theologian and Orthodox saint – and he presents another type of authority altogether.

    Palamas is best known for defending Hesychasm, a mystical tradition in the Orthodox Church that joins repeated prayer with contemplation. He represented holy power grounded not only in learning, but also in spiritual practice.

    An icon shows a brunette man with a long beard, wearing white robes and positioned against a gold backdrop.
    An icon of St. Gregory Palamas from the 15th century. Pushkin State Museum of Fine Arts via Wikimedia Commons

    Unlike Domenichino’s dramatic Athanasius, the painting of Palamas appears still and distant. He is not turning toward the viewer with theatrical movement, but formally facing outward, set against a plain gold background – a sacred figure, held outside ordinary time.

    Palamas’ image is an icon, a sacred image used in Orthodox Christian worship and devotion. The saint raises his hand in the Orthodox gesture of blessing, with his fingers forming the letters “IC XC,” a Greek abbreviation for Jesus Christ.

    In sacred art, hands are rarely idle. Christ and the Christ child often hold up their hands to bless the viewer. Mary and John the Baptist draw viewers’ attention to Christ through their gestures and sometimes their gaze. Saints lift their hands in prayer, teaching or intercession.

    To some viewers online, Palamas’ raised hand may simply look solemn or strange, charged with an unknown or mysterious meaning. But that gap in knowledge, I’d argue, is part of what makes the “church fathers” trend work. On social media, a hand gesture doesn’t need to be fully explained to feel meaningful: a slow point toward the camera, a hand over the heart, a peace sign.

    TikTokers today may be a great distance from the church fathers, but their images still resonate – even, and perhaps especially, on the internet.

    This article originally appeared on The Conversation. You can read it here.

  • Beyond birds and mice, free‑ranging cats eat a surprising number of insects
    Photo credit: SKashkin/iStock / Getty Images PlusDoes that look tasty?

    It’s pretty commonly known, and not very startling, that free-ranging cats eat birds and small rodents. But the degree to which they eat insects might surprise you.

    We are biologists who for many years have been trying to figure out what feral or outdoor-roaming pet cats eat outside.

    When domesticated cats – Felis catus – live freely in the wild or are allowed to hunt outside the homes where their owners live, they are an invasive species, which live in every ecosystem of the world except the continent of Antarctica. We wanted to know all of the species they eat – and to what degree free-ranging cats are eating endangered or threatened species.

    Examining reams of research

    Over the past two decades, we have evaluated hundreds of scientific findings, including searching through Google Scholar and Web of Science using the keywords “cat predation,” “feral cat,” “cat diet” and “Felis catus.” For each item we found, whether peer-reviewed or not, we evaluated whether it contained conclusive evidence of cat diet or predation. We also reviewed each one’s reference section for additional unique articles or databases pertaining to cat diet and predation, and included those in our search.

    Overall, we identified 533 unique publications – books, journal articles, theses and agency reports – that reported specific animal species consumed by cats. Cats’ plant-eating habits are occasionally, but haphazardly, noted in studies, so we did not include them in our analysis.

    Our initial work focused on an overall assessment of what free-ranging cats eat around the world. Published in 2023, this paper analyzed the 533 studies on cat diet or predation events published over more than a century and found that cats ate nearly 2,100 different species of animals, including invertebrates.

    Of those 2,100, the International Union for Conservation of Nature’s Red List of Threatened Species listed 347 as “near threatened,” “vulnerable,” “endangered,” “critically endangered” or “extinct” in 2023. Some of the species went extinct during the many decades covered by the data.

    Most of the species cats eat are not in danger

    Insects and the like

    Most of the species cats ate were vertebrates – mostly birds, followed by mammals and reptiles. But the data also indicated that at least 7% of the species cats eat are insects and other invertebrates, particularly beetles, and less frequently crustaceans, arachnids, centipedes, snails and slugs, and millipedes.

    Many of the cat studies we reviewed did not report on how many individuals of a given species cats ate, so it was unclear what the total amount of insects was or how many calories cats are deriving from insects.

    Invertebrates make up more than 70% of all terrestrial animal species and are important pollinators, predators and herbivores in virtually every nonmarine ecosystem. Many invertebrates are in decline globally due to urbanization, habitat destruction, increases in both light and pesticide pollution, and climate change. So we dug deeper into the data to understand what invertebrates cats are eating.

    While a little more than one-third of all the studies we analyzed included invertebrates as part of cats’ diet, most of those failed to identify specific species of invertebrates. But we were able to find identifications of 148 invertebrate species.

    Of those, two are considered endangered by the International Union for Conservation of Nature: the Aldabran grasshopper (Pternoscirtus aldabrae) in Seychelles and the Tasmanian giant freshwater crayfish (Astacopsis gouldi), which can grow up to 13 pounds (6 kilograms). Two others are considered vulnerable: wētāpunga (Deinacrida heteracantha), an insect native to New Zealand that can be about the size of a mouse, and the common yabby (Cherax destructor), a freshwater crayfish native to southeastern Australia. One other, the Canary Islands horned beetle (Arhopalus pinetorum), is listed as “near threatened.”

    A cat licks its lips while crouching over a dead mouse.
    Not surprising: Cat eats mouse. Julian Stratenschulte/picture alliance via Getty Images

    Effects on populations

    We have not found formal research evaluating how cats’ eating habits affect invertebrate populations. And for many species, they are likely not as significant a factor as wide-scale pesticide use.

    But it’s possible that cats could be significant contributors to the deaths of rare species or in specific locations.

    Cats require a large amount of protein, as much as one-third of their daily diet, and invertebrates are good sources of protein.

    In many places, invertebrates provide an easy source of food. Whether in an urban backyard or on a remote island, cats are unlikely to turn a blind eye to available prey. And some cats may find it entertaining to chase, catch and eat insects even if they don’t need their nutrition.

    A challenge of researching this question is that many invertebrates are relatively small, which makes direct observation in the field harder and can require more analytical approaches in the lab. And they have soft bodies, without distinguishing characteristics that could be easily recognized in scat or stomach contents.

    However, molecular technologies can identify species using trace amounts of DNA left in the environment by animals. Promising new studies are beginning to identify what cats eat by analyzing the DNA found in their stomachs and scat. That research may help explore in even more detail what cats are eating in the outdoors, and how it’s affecting various species and the environment as a whole.

    This article originally appeared on The Conversation. You can read it here.

  • The University of Cambridge found a way to reduce plastic waste and create clean hydrogen energy at the same time
    Photo credit: CanvaPlastic bottles, left, and an airplane.

    The world’s top environmental concerns come down to two basics: reducing waste and creating clean energy. Thanks to researchers at the University of Cambridge, we may be able to tackle both with a single solution.

    Inspired by a previous solar-powered reactor the team created that turned carbon dioxide and plastic waste into fuel and useful chemicals, the researchers developed a new device that uses sunlight to break down plastic into hydrogen.

    “Converting waste streams into valuable products using clean energy sources is…an attractive strategy to address both energy and environmental concerns,” the team wrote in Nature Chemical Engineering.

    How does this device work?

    The reactor is relatively simple compared to others of its kind. The researchers sprayed a light-absorbing material onto a glass panel. They then added a second layer of molecules containing zirconium and cobalt to act as the catalyst for the reaction. All told, the device measures about one square meter and was tested under natural sunlight.

    Under sunlight, the device was able to extract hydrogen from sliced-up plastic bottles. It also extracted hydrogen from glucose and cellulose. This means the device can produce hydrogen from both plastic and plant waste.

    Hit two problems with one device

    This could help reduce a rapidly growing problem. The world produces more than 359 million tons of plastic each year, much of which ends up in landfills. Most modern plastics take 100 to 1,000 years to decompose. Much of the plastic polluting our land and oceans comes from food packaging, including water bottles. This device can turn those plastics into a cleaner fuel source. It could also help address the growing problem of microplastics contaminating drinking water and soil.

    Hydrogen is a powerful fuel for trucks, ships, and airplanes, and demand for it is growing. Because it typically produces only water as a byproduct, it is a highly sought-after source of clean energy. While there are green methods for producing hydrogen using solar and wind power, a significant amount of the world’s hydrogen still comes from natural gas. In other words, while hydrogen itself is a clean source of energy, the way much of it is produced is not.

    Could this device work realistically on a global scale?

    The use of spray coating and relatively simple materials makes this new reactor easier to manufacture.

    “What surprised me was, after all the optimization, just how simple it is,” researcher Ariffin Bin Mohamad Annuar said in a press release. “We just have this huge panel, we spray our catalyst on it, put it into our solution, put it under the sun, and it produces hydrogen and other valuable chemicals just from plastic waste. It’s just simple and scalable.”

    The team says that before they can make the device commercially available, they hope to make it more durable and efficient. Time will tell whether it becomes a solution to both problems as it becomes more widely available.

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