Hold on to your seats, science is going down (literally). The SpaceX Dragon capsule has touched down from the International Space Station. The capsule reached Earth in the Pacific Ocean 300 miles west of Baja California. The capsule returned over 3,500 pounds of cargo and samples for NASA to examine. According to a NASA news release, included in the science payload is a medical studies investigation into the decreased effectiveness of antibiotics in space and the T-Cell Activation in Aging experiment, which is trying to understand how the human immune system responds to microgravity. Also included in the Dragon payload is an investigation into the cultivation of plants that may adapt to growing in a space environment.