MIT-trained physicist and award-winning science communicator Dianna Cowern, known to more than 3.1 million subscribers as Physics Girl, released her first educational video in three years.
The 34-year-old creator has been largely absent from the digital space since July 2022, following a diagnosis of severe Long COVID that evolved into Myalgic Encephalomyelitis/Chronic Fatigue Syndrome (ME/CFS).
In the emotional update, Cowern filmed from her bed to explain the science of neutrinos—subatomic particles often called ghost particles because they pass through matter without interaction.
The return marks a significant milestone for the creator economy, which has followed Cowern’s health journey through updates provided by her husband and fellow creators.
During the filming, Cowern demonstrated the physical toll of her condition, noting that her energy levels dropped significantly after just 15 minutes of work.
She explained that she is currently practicing pacing, a medical strategy used by ME/CFS patients to manage limited energy reserves and prevent a crash (a severe worsening of symptoms triggered by even minor physical or mental exertion).
Cowern used the new video to bridge the gap between her long absence and her passion for physics by comparing neutrinos to her own experience.
She noted that these particles are the most elusive in the universe, taking only 2.3 seconds to escape the sun’s core while light takes hundreds of thousands of years.
The educator highlighted how a detector in Japan, the Super-Kamiokande, captures these particles deep underground, much like her own life has been restricted to dark, quiet rooms during her recovery.
The creator’s health crisis began shortly after her marriage in 2022, eventually leaving her bedbound and unable to perform basic tasks like reading or speaking for extended periods.
Her sister and husband launched major fundraising efforts in 2024, raising over $150,000 for the Open Medicine Foundation to support research into post-viral illnesses.
Before her illness, Cowern was a central figure in the science YouTube community, collaborating regularly with creators like Derek Muller of Veritasium and the team at PBS Digital Studios.
A graduate of the Massachusetts Institute of Technology, she received the Best Web Personality award at the 2018 Webby Awards and was featured in the Forbes 30 Under 30 list.
While this new video does not signal a full-time return to her previous filming schedule, it represents the first time since 2022 that Cowern has been healthy enough to synthesize complex scientific data for her audience.
