Today on Cool Science Radio, Lynn and John are joined by Dr. Jacob Bleacher . Dr. Bleacher is the Chief Exploratio n Scientist of Advanced Exploration Systems , a division of NASA’s Human Exploration and Operations Mission Directorate . Humans have not walked on the moon since Apollo 17 in 1972. In Greek mythology, Artemis was the twin sister of Apollo. Artemis is also the name of the next moon mission where NASA will land the first woman and next man on the Moon by 2024. They will be using