Spaceflight is hard on the heart, yet artificial ones grow better in space than on Earth
space.com May 4, 2026

Spaceflight is hard on the heart, yet artificial ones grow better in space than on Earth

AI-summarised brief · reviewed before publication

Researchers have found that mini-hearts grown from human stem cells in space grow significantly faster than those grown in labs on Earth. The human heart shrivels in space due to microgravity, but growing mini-hearts from scratch in space produces better results. A new study shows that mini-hearts seeded with human stem cells grow better in space, with a significant increase in organoid production. This discovery was made by Arun Sharma and his team.

💡 Why It Matters

  • · Space-grown organoids could be used to help patients with heart damage awaiting transplants, offering potentially superior quality patches and organoids.