Falcon 9 rocket

The Cargo Dragon capsule is carrying dozens of new science experiments to help researchers understand the biological challenges of spaceflight.

The launch marks the first reuse of an improved Falcon 9 "Block 5," which includes several upgrades designed to allow SpaceX to quickly refurbish and re-launch the rocket.

A SpaceX rocket that flew just two months ago with a NASA satellite roared back into action Friday, launching the first orbiting robot with artificial...