Hank Green is an American entrepreneur, author, and YouTube content creator, best known for his educational videos and engaging online presence. He co-founded the popular YouTube channel Vlogbrothers with his brother, John Green, where they discuss a variety of topics, including science, literature, and social issues. Hank is also the creator of the educational channel CrashCourse, which offers free courses on subjects like history, biology, and literature. In addition to his work on YouTube, Hank Green is an advocate for science communication and has authored several books, including An Absolutely Remarkable Thing. He is involved in various projects that promote education and creativity, such as the annual VidCon conference, which celebrates online video and content creators.