ST. LOUIS, Missouri — Rebecca Caroline “Becky” Thompson, a physicist, science educator, author and accomplished endurance athlete who helped bring science closer to the public, has died at the age of 47.

Thompson, vice president of science and education at the Saint Louis Science Center, died after suffering cardiac arrest during an attempt to swim the Catalina Channel off Southern California on July 31.

Her death brought together two very different parts of the life she had built: a career devoted to helping people understand science and a personal passion for pushing herself through some of the world’s most demanding endurance challenges.

For colleagues, students, science enthusiasts and the many people who knew her personally, Thompson leaves behind a remarkable record of work, curiosity and determination.

A Career Built Around Making Science Accessible

When Thompson joined the Saint Louis Science Center in 2024, she brought with her more than two decades of experience in science education, public engagement and outreach.

She had already established herself as a leader who believed that science should not be confined to laboratories, universities or professional conferences. It should be something ordinary people could experience, question and enjoy.

At the Science Center, she served as vice president of science and education, helping shape educational programming, exhibitions and opportunities for visitors to connect with scientific discoveries and innovation.

Her tenure coincided with a major transformation of the James S. McDonnell Planetarium. After an 18-month renovation, the planetarium reopened on July 18, giving the Science Center a significantly updated facility for public science education.

For Thompson, the work was part of a larger mission: making complicated ideas understandable and inviting people of all ages to become curious about the world around them.

From Physics to Public Engagement

Thompson’s professional path had taken her through some of the country’s leading scientific institutions.

Before arriving in St. Louis, she worked at Fermilab near Chicago, where she served as head of education and public engagement. Her responsibilities included oversight of education and public-facing programs associated with the Lederman Science Center.

Earlier in her career, Thompson spent 11 years with the American Physical Society.

There, her work showed the imaginative side of her approach to science communication.

Among her projects was “Spectra: The Laser Superhero,” a physics comic-book series accompanied by hands-on science kits designed to introduce middle-school students to science. She also helped bring physics outreach to San Diego Comic-Con, an unusual setting that reflected her belief that science could meet people wherever their interests took them.

She earned her bachelor’s degree in physics from Bryn Mawr College in 2001 before completing a doctorate in physics at the University of Texas at Austin in 2007.

Her contributions to the scientific community were later recognized with fellowship in the American Physical Society in 2016 and the American Association for the Advancement of Science in 2023.

Becky Thompson Was More Than Her Career

For all of Thompson’s professional accomplishments, her life was not defined solely by laboratories, classrooms, museums or scientific institutions.

She was also an athlete who repeatedly chose challenges that demanded extraordinary physical and mental endurance.

Thompson completed 15 Iron-distance triathlons, a remarkable achievement in itself. Among them was the 2024 Ironman World Championship in Nice, France.

She later turned increasingly toward open-water swimming, taking on ice swimming and marathon swimming as new challenges.

The Catalina Channel attempt represented another step in an ambitious goal: completing the Triple Crown of Open Water Swimming, which consists of crossings of the English Channel, the Catalina Channel and the Manhattan Island Marathon Swim.

That pursuit says something about the way Thompson approached life.

She did not simply study difficult things. She appeared drawn to experiences that required preparation, resilience and a willingness to find out what was possible.

An Author Who Brought Science Into Popular Culture

Thompson’s interest in communicating science also extended to writing.

She was the author of several books, including Fire, Ice, and Physics: The Science of Game of Thrones, bringing scientific ideas into a world better known for fantasy, dragons and epic battles.

That ability to connect scientific concepts with popular culture reflected the same philosophy that characterized much of her professional career.

Science did not have to be intimidating.

It could be entertaining, accessible and part of everyday conversation.

Rebecca Thompson Cause of Death

According to the obituary information, Thompson suffered cardiac arrest on July 31 while attempting to swim the Catalina Channel off Southern California.

Her death occurred in connection with the swim attempt.

The circumstances surrounding the medical emergency should be understood from the information released by her family and official sources rather than speculation. No additional medical explanation should be attributed to her death unless confirmed.

Family and Memorial Plans

Thompson is survived by her husband, Philip “Bo” Hammer, along with other family members.

A private memorial celebration is planned in St. Louis.

The Saint Louis Science Center has also established a memorial fund in her honor. The organization has indicated that her commitment to making science understandable and engaging will continue to influence its work.

That may be one of the most fitting tributes to someone whose career centered on encouraging curiosity.

Remembering Rebecca “Becky” Thompson

There are several ways to measure a person’s career: titles held, institutions served, awards received and projects completed.

But Thompson’s legacy can also be measured by the people who became interested in science because she made it feel accessible.

A student discovering physics through an engaging program, a museum visitor seeing an exhibition differently, a reader finding science inside a story about Game of Thrones, or a young person realizing that scientific curiosity could be exciting — those moments were at the heart of the work Thompson spent her career pursuing.

Away from that professional legacy was the athlete who kept setting difficult goals and the woman who pursued adventure through endurance sport.

Her life therefore brought together intellect, education, creativity, physical courage and an unusually strong sense of curiosity.

Rebecca Caroline “Becky” Thompson was 47.

She leaves behind her husband and family, as well as colleagues and friends across the scientific, educational and athletic communities.

Her work will remain visible in the programs she helped develop, the people she mentored, the science she helped explain and the institutions she served.

For those who knew her, however, the memories will undoubtedly be more personal: conversations, races, books, scientific discoveries, laughter, friendships and the many ordinary moments that made up a life far larger than any résumé could capture.

Disclaimer: This obituary is based on information provided in published obituary and institutional material. Details concerning Thompson’s death and personal life are presented only where they have been publicly reported or confirmed. Funeral and memorial arrangements may change as the family releases additional information.