Daniel is a Professor of Astronomy and Planetary Sciences at The University of Arizona. His research focuses on extrasolar planet discovery and characterization, including studies of planetary atmospheres, planet formation, and planetary habitability. Daniel is Principal Investigator of the Earths in Other Solar Systems team, a large interdisciplinary NASA-funded research group exploring how habitable exoplanet form. He also leads Project EDEN, a search for habitable worlds around the closest stars; and Cloud Atlas, a large program on the Hubble Space Telescope that studies clouds in extrasolar planets. Apai's research website and blog is on http://apai.space and he tweets about exoplanets and astrobiology at @danielapai .