30 Seconds to Mars / Thirty Seconds to Mars October 15, 2020 by Amanda London · Published October 15, 2020 · Last modified May 9, 2023 Thirty Seconds to Mars The band, Thirty Seconds to Mars, was created in in 1998 by two American brothers named Shannon Leto, and Jared Leto. As the group grew in fame, they recruited other musicians including the following:...