A resupply spacecraft docked with the International Space Station on Saturday and delivered dozens of scientific experiments, including neurology projects from UC San Diego and Aspen Neuroscience of La Jolla.

UCSD sent primitive “mini brains” that were made from human stem cells derived from adults. Researchers want to see how the samples are affected by microgravity, which could eventually help humans live and travel in space. The experiment also could help scientists understand Parkinson’s disease and other neurological disorders.

Aspen Neuroscience sent a similar experiment.

The UCSD samples will be returned to Earth in late August, about one month before astronaut Jessica Meir, one of the school’s graduates, arrives at space station for a prolonged stay.