Before Artemis II, there had to be an Artemis I.

The Artemis astronauts will be taking something strange on their voyage: four living "organ chips" — bone marrows, made from their own cells — the size of thumb drives. These “completely functional” living bone marrow chips will be studied as part of the sci-fi sounding AVATAR experiment.

He walked on the moon in 1972. This is his advice for the Artemis II astronauts.

Watch Artemis 2 fly through space in real time with this telescope livestream tonight