All the Experiments Aboard Saturday’s ISS Resupply Mission

AT 7:37 AM Eastern time on Saturday, a Cygnus cargo ship jam-packed with over three tons of crew supplies and hardware will blast toward the International Space Station atop Orbital ATK’s Antares rocket. ISS resupply missions aren’t just about making sure astronauts never run out of toilet paper. (Those folks keep a six month stockpile of all necessities anyway, which is why it isn’t a huge deal when the cargo ships ferrying their food and spacewalking equipment occasionally—or really, semi-regularly—go kaboom.) Where things really get interesting is in the research payloads—the science catching a ride on an otherwise logistical launch.