Geoffrey Notkin is an American actor, author, and entrepreneur. Notkin is known as one of the hosts of Meteorite Men, a documentary reality television series from Science Channel, which ran for three seasons. He is the president of the National Space Society, and holds a seat on the National Space Society Board of Governors. He is a long-time member of The Explorer's Club. In 2013, Notkin's Twitter account was nominated for a Shorty Award, honoring the best in social media.