I thing that you already know SpaceX from the news or a magazine or any other way. It is a high tech aerospace company and one the best root to find amazing photos of technology and engineering combined together. For example the picture above! It is a Merlin engine used in the Falcon 1 and Falcon 9 rockets. The propellants of this engine are the RP-1 and liquid oxygen and it’s designed for sea recovery and reuse. I can talk all day about rocket engines but I will let the picture speak. Come on… this is beautiful!