A Houston entrepreneur is creating a fun and educational platform for children that helps to preserve their heritage. Photo by Kelly Sikkema/Unsplash

Theoharis Dimarhos grew up in a family determined to follow tradition. As a child, his mother serenaded him with old Greek folk songs he still remembers, and his parents made speaking Greek a rule of the house. Dimarhos lived the immigrant family experience, and now he's developed a modern way to preserve pass down culture to the masses.

"My parents came from Greece in 1981, and in typical fashion, they didn't have much and didn't speak the language at all," says Dimarhos, who was born in Cleveland, Ohio. Living the first-generation American experience, he watched his parents work tirelessly to provide for the family and maintain their Greek culture in America.

Dimarhos did get his own immigrant story when his parents decided to move back to Greece when he was 7. After assimilating to Greece, he traveled back to the United States for college, where he learned to readjust once more.

"I kind of got that immigrant experience a couple of times," he says.

While Dimarhos grew up surrounded by his own heritage, he began to realize that "our native cultures were destined to fade if there wasn't a more modern way for children and our little siblings to learn more about their roots."

When talking with his friends from other countries outside of Greece, a general consensus grew: without modern learning, family heritage would slip away.

Enter: Ellis, an app that helps children connect to their culture. The app includes Greek songs, fables, mythology, history, and language.

Named after Ellis Island, a gateway into the United States for so many immigrants in history, Ellis nurtures Greek tradition in a way that caters to children through technology.

"I've always seen [Ellis Island] as a monument of courage to chase your dreams. . .people came and built this country, but also never forgot where they came from."

Interactive technology is becoming a large part of early childhood education, especially during COVID-19, as more families are at-home with children learning virtually. Children are the targets of over 80 percent of the top-selling paid apps in the education category of the iTunes store, according to a published analysis by Carly Shuler in 2012.

Dimarhos and his wife are deeply tied to their Greek heritage, and hope to pass that history and appreciation to their own children once they start a family.

"We wanted to make sure that there was a 21st century way for us and for our children to learn that goes beyond books," he says. "Something that's a little more immersive and fun — fun is very important — and educational."

Ellis is currently being beta tested with a group of 200 active users within the Greek community. The app, which targets ages 0-8, rolls out weekly content to parents.

"I'm receiving texts from friends who are parents begging me to put more content out because they need something to keep their children occupied," says Dimarhos. "Not only are regular schools closed, but cultural schools that are offered by the community are also closed and struggling to open back up."

Time spent on the app can be as short as five minutes and stretch into hours of learning time.

"The goal is always for children to pick up little phrases and words each time they listen," explains Dimarhos.

The stories and songs are all audio-based, tying into activities like waking up, eating breakfast, and bathtime.

"There's something magical about tying in an audio story or song with everyday tasks for kids," says Dimarhos.

Dimarhos parents see the app as "the next step of passing down the torch of our culture," he says.

"They tried to do it with the tools that they had for myself and my sister. . .We're trying to do the exact same thing that they did and their parents did, just with the tools that technology offers us," he says.

Dimarhos, who previously worked in economic development in Austin, had his first experience with startups when his former boss gave him a chance to work with his international accelerator for startups.

"I got my opening into the tech world through the international accelerator and seeing amazing immigrant founders create jobs and strive to do great things in America," he shares.

"Quite honestly, a startup that celebrates different cultures couldn't have a better home than in Houston," he says, noting the massive immigrant population and variety of cultures in the city.

In Dimarhos' own life, he's come across immigrants as well as first and second generation Americans who wish to preserve their own cultures.

"They've wished there was a more modern way to have access to those resources," he explains.

In the future, Dimarhos intends to quickly broaden the app to "launch in every immigrant community in the United States and around the world."

Connecting to cultural roots is something Dimarhos feels is "sacred" to immigrant families.

"It's something that you have the obligation from your parents as they give you everything for you to succeed in life. You kind of carry that obligation to carry that torch and pass it on to your children and their children," he explains.

"We grow up with that and the vision and the mission is just to create something that makes that a little bit easier to keep our cultures alive. I honestly think it's part of what makes this country great," he says.

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Houston medtech firm secures $30M for neurosurgical robot

stroke surgery

Robotic neurosurgery is an exciting new frontier in medicine, and Houston-based medtech firm XCath is leading the charge with its revolutionary Iris robotic system. The company announced in March that it had secured $30 million in Series C funding to continue developing systems to tackle blood clots in the human brain.

“We are grateful to our investors for their conviction in our shared mission to improve clinical outcomes for patients impacted by endovascular diseases,” Eduardo Fonseca, CEO of XCath, said in a news release. “In 2025, the XCath team advanced the frontiers of endovascular robotics. This funding accelerates our commitment to expanding access to life-saving care so that where a patient lives no longer determines whether they live.”

XCath–which also has campuses in Pangyo, South Korea–has already achieved a number of remarkable firsts in robotic neurosurgery. The Iris is the only endovascular robotic system currently in development to perform intracranial navigation or neurointerventional treatment, and is the only robot in the world to have performed an intracranial neurovascular procedure involving the robotic manipulation of three devices.

These new Series C funds, which bring the company's total investment to $92 million, will go toward developing a clinical telerobot capable of performing a mechanical thrombectomy. This would bring unprecedented accuracy and precision to the surgical removal of brain clots, significantly reducing the risk of neurosurgery.

“Robotic surgery succeeds when innovation is paired with practical execution,” Dr. Fred Moll, chairman of the XCath board of directors, said in the release. “XCath has built a promising technology foundation, and just as importantly, a team that values rigor and appreciates perspective. I’m excited to support them as they take on the mission of globalizing access to gold-standard care for stroke patients.”

In November 2025, the Iris debuted under the control of Dr. Vitor Mendes Pereira at The Panama Clinic in Panama City, alongside local Principal Investigator Dr. Anastasio Ameijeiras Sibauste. It was only the second time in human history that a robot had been used for intracranial neurovascular intervention, and it established Iris as a viable technology in the fight against stroke.

“Treatment of stroke and other neurovascular diseases represents one of the most significant financial opportunities in healthcare, supported by positive reimbursement dynamics and strong demand from health systems,” Nicholas Drysdale, CFO of XCath, added in the release. “With our continued investor support and disciplined capital deployment, XCath is positioned to build a category-leading platform in endovascular robotics”.

Houston geothermal unicorn Fervo officially files for IPO

going public

Fervo Energy has officially filed for IPO.

The Houston-based geothermal unicorn filed a registration statement on Form S-1 with the U.S. Securities and Exchange Commission on April 17 to list its Class A common stock on the Nasdaq exchange. Fervo intends to be listed under the ticker symbol "FRVO."

The number and price of the shares have not yet been determined, according to a news release from Fervo. J.P. Morgan, BofA Securities, RBC Capital Markets and Barclays are leading the offering.

The highly anticipated filing comes as Fervo readies its flagship Cape Station geothermal project to deliver its first power later this year

"Today, miles-long lines for gasoline have been replaced by lines for electricity. Tech companies compete for megawatts to claim AI market share. Manufacturers jockey for power to strengthen American industry. Utilities demand clean, firm electricity to stabilize the grid," Fervo CEO Tim Latimer shared in the filing. "Fervo is prepared to serve all of these customers. Not with complex, idiosyncratic projects but with a simplified, standardized product capable of delivering around-the-clock, carbon-free power using proven oil and gas technology."

Fervo has been preparing to file for IPO for months. Axios Pro first reported that the company "quietly" filed for an IPO in January and estimated it would be valued between $2 billion and $3 billion.

Fervo also closed $421 million in non-recourse debt financing for the first phase of Cape Station last month and raised a $462 million Series E in December. The company also announced the addition of four heavyweights to its board of directors last week, including Meg Whitman, former CEO of eBay, Hewlett-Packard, and Spring-based HPE.

Fervo reported a net loss of $70.5 million for the 2025 fiscal year in the S-1 filing and a loss of $41.1 million in 2024.

Tracxn.com estimates that Fervo has raised $1.12 billion over 12 funding rounds. The company was founded in 2017 by Latimer and CTO Jack Norbeck.

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This article originally appeared on our sister site, EnergyCapitalHTX.com.

New UT Austin med center, anchored by MD Anderson, gets $1 billion gift

Future of Health

A donation announced Tuesday, April 21, breaks a major record at the University of Texas at Austin. Michael and Susan Dell are now UT Austin's first supporters to give $1 billion. In response, the university will create the UT Dell Campus for Advanced Research and the UT Dell Medical Center to "advance human health," per a press release.

The release also records "significant support" for undergraduate scholarships, student housing, and the Texas Advanced Computing Center for supercomputing research.

Both the new research campus and the UT Dell Medical Center will integrate advanced computing into their research and practices. At the medical center, the university hopes that will lead to "earlier detection, more precise and personalized care, and better health outcomes." The University of Texas MD Anderson Cancer Center will also be integrated into the new medical center.

That comes with a numeric goal measured in 10s: raise $10 billion and rank among the top 10 medical centers in the U.S., both in the next decade.

In the shorter term, the university will break ground on the medical center with architecture firm Skidmore, Owings & Merrill (SOM) "later this year."

“UT Austin, where Dell Technologies was founded from a dorm room, has always been a place where bold ideas become real-world impact,” said Michael and Susan Dell in a joint statement.

They continued, “What makes this moment so meaningful is the opportunity to build something that brings every part of the journey together — from how students learn, to how discoveries are made, to how care reaches families. By bringing together medicine, science and computing in one campus designed for the AI era, UT can create more opportunity, deliver better outcomes, and build a stronger future for communities across Texas and beyond.”

This is the second major gift this year for the planned multibillion-dollar medical center. In January, Tench Coxe, a former venture capitalist who’s a major shareholder in chipmaking giant Nvidia, and Simone Coxe, co-founder and former CEO of the Blanc & Otus PR firm, contributed $100 million$100 million.