Past Event Meteorite Crash Course and Reddit AMA with Marina Gemma Share Add to Calendar: Google Yahoo October 21, 2020 2:00 PM - 4:00 PM Watch Marina Gemma's short meteorite crash course video, then ask her anything on Reddit. Join Marina on Reddit: https://www.reddit.com/r/IAmA/comments/jfhwmh/i_am_a_phd_student_studying_meteorites_and/