NASA astronaut Megan McArthur (IMAGE) NASA/Johnson Space Center Caption The second CCP mission, which launched on April 21, 2021 and splashed down Nov. 8, 2021, included NASA astronaut Megan McArthur. In this image, she works on Cardinal Muscle, an investigation testing whether engineered tissues cultured in space could provide a model for studying muscle loss and assessing possible treatments prior to clinical trials. Credit NASA Usage Restrictions No restrictions. License Public Domain Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.