Adventure Scientists’ Becky Schnekser talks about the Plastic-Free Parks TrashBlitz, a nationwide effort empowering volunteers to track and clean up plastic waste across U.S. national parks and federal lands. Then, NASA Sagan Fellow Margaret Thompson discusses her groundbreaking research on rocky exoplanets. Using laboratory experiments and theoretical models, she explores how these distant “magma worlds” form, evolve and develop atmospheres that may one day reveal signs of life.