Jonny Kim spent 245 days aboard the International Space Station doing work that sounds like science fiction but is quietly reshaping medicine on Earth. On Friday, Dec. 19, he'll walk through what he saw up there — and why it matters for patients who'll never leave the ground.
Kim returned to Earth on Dec. 9 alongside two Russian cosmonauts after nearly 104 million miles of travel. Over eight months, the three of them completed 3,920 orbits, watched nine spacecraft arrive and six depart, and turned the station into a floating laboratory for experiments that simply can't happen anywhere else.
The work that happened 250 miles up
One of Kim's main projects involved bioprinted tissues — essentially, growing human tissue in microgravity with blood vessels intact. On Earth, gravity makes this nearly impossible. In space, it works differently. The implications are significant: if scientists can perfect this technique, they could grow replacement tissues for patients with damaged organs or skin. It's not a headline-grabbing breakthrough yet, but it's the kind of foundational work that precedes them.
We're a new kind of news feed.
Regular news is designed to drain you. We're a non-profit built to restore you. Every story we publish is scored for impact, progress, and hope.
Start Your News DetoxHe also tested remote-controlled robots in space, piloting them from Earth to see how well humans could operate machines from a distance. This matters for future missions to the Moon and Mars, where real-time communication becomes impossible — astronauts will need robotic assistants that can be directed reliably across vast distances.
A third focus: manufacturing nanomaterials that mimic DNA structure while in orbit. These materials could improve how drugs are delivered through the body and open doors for regenerative medicine treatments that don't yet exist.
None of this work makes for viral social media. It's methodical, incremental, and entirely dependent on people spending months in a tin can hurtling around the planet. But it's how progress actually happens — one experiment, one mission, one person floating in microgravity.
Kim's news conference will stream live on NASA's YouTube channel at 3:30 p.m. EST Friday, Dec. 19, from Johnson Space Center in Houston. He'll walk through what he observed, what worked, what surprised him, and what comes next.
