SpaceX had over 15 years of research into a project they hoped would prove that a rocket discarded in the ocean after a single flight could be recovered and reused.
Yesterday it was proven.
SpaceX's Elon Musk says his "mind's blown".
Musk says the next goal is to turn around the booster for a relaunch in 24 hours, which he believes could be achieved in the next year.
"The potential is there for (an) over 100-fold reduction in the cost of access to space. If we can achieve that, it means humanity can become a space-faring civilization and be out there among the stars." -Musk