Andres Bratt-Leal, Ph.D., of Aspen Neuroscience, talks to NASA Social participants during a What’s On Board science briefing at the agency’s Kennedy Space Center in Florida on July 23, 2019. Bratt-Leal is a principal investigator for the Effects of Microgravity on Microglia 3-Dimensional Models of Parkinson’s Disease and Multiple Sclerosis (Space Tango-Induced Pluripotent Stem Cells) payload. The briefing was held for SpaceX’s 18th Commercial Resupply Services (CRS-18) mission to the International Space Station. The SpaceX Falcon 9 rocket and uncrewed Dragon spacecraft are scheduled to launch July 24, 2019, from Space Launch Complex 40 at Florida’s Cape Canaveral Air Force Station.