Researchers at the University of California San Diego discovered that spaceflight conditions foster accelerated aging in human hematopoietic stem and progenitor cells (HSPCs), key to blood and immune system regeneration. Using AI-driven nanobioreactor systems aboard the International Space Station, they observed elevated cell division, increased DNA damage, and evidence of telomere shortening in these cells after space exposure. These findings have profound implications for astronaut health during prolonged missions and offer new insights into aging mechanisms and age-related diseases such as cancer on Earth.