Astronauts On ISS Experienced Blood Clots, Reverse Blood Flow
Astronauts on ISS experienced reverse blood flow and blood clots. Findings are important in evaluating risks of long term spaceflights. https://www-m.cnn.com/2019/11/15/health/astronaut-blood-flow-clot-scn-trnd/index.html (Photo courtesy of cnn.com)