“If humankind is ever going to become an interplanetary species, we’re going to need cheaper rides into space. That’s why SpaceX and Blue Origin have been working so hard at developing reusable rocket boosters’vehicles that, after launch, are recovered and refurbished and flown again, instead of getting wastefully dumped in the ocean. On Thursday evening, SpaceX proved a key part of its reusable rocket plan: the re-using part. The private spaceflight company has gotten pretty deft at recovering its rocket boosters, landing them on solid ground as well as floating platforms in the ocean. Now it has shown that the boosters can fly again afterwards.”