David Callejas, Marketing Director, helps bring EarthSky's content to the world via online ads and other products. He creates strategies that help people around the world find us, and appreciate the work we do. And he acts as the liaison between EarthSky and its 1,200+ broadcast affiliates. Thanks to these affiliates, millions around the world hear EarthSky programs every day. Plus David contributes posts to both our English and Spanish websites. Go David!