The medical center previously conducted a test with bacteria in simulated space conditions, which showed a reduced ability to develop antibiotic resistance, but the latest experiment is the first one to take place at the ISS.

An international crew of four astronauts launched toward the International Space Station from Florida on Friday aboard a SpaceX rocket, embarking on a routine NASA mission that could be the first of many to last a couple months longer than usual.

July 31 (UPI) -- SpaceX's Crew-11 mission to the International Space Station was scrubbed just before launch on Thursday. The flight, scheduled to take off from Kennedy Space Center in Florida, was scrubbed due to an unfavorable weather forecast for the launch site. The next attempt will be 11:43 a.m. EDT Friday.