Normally, you build these complicated, expensive rocket motors, launch them off and then let them crash back into the ground or ocean. It's a waste of resources.

SpaceX is making them re-usable. A single rocket could make dozens of flights; without the need to re-build your fleet of rocket engines every year.

This could reduce cost to orbit by an entire order of magnitude, which would result in a dramatic increase in space commercialization and industry.

Even after all that gushing, I still don't think I can properly put into words how exciting an accomplishment this is in the aerospace industry.

You know all those movies where spaceships descend through the atmosphere and land gracefully on the ground, instead of crashing through and burning up and splashing into the ocean?

THIS IS WHERE THAT STARTS FOR REAL.

Admins, please forgive the double-B.O.-posting, this is just too exciting not to share everywhere! :)