In late July, over 200 researchers, engineers and managers gathered in Laurel, Maryland, for the 2019 Lunar ISRU Workshop. ISRU stands for In-Situ Resource Utilization. In other words, the meeting was all about using what can be found on the Moon–to support human habitation, to create new businesses, and to help build out an economy in space. The presentations from that meeting are now available online, for anyone interested in this growing, exciting field: