Space travel has come a long way since Russian cosmonaut Yuri Gagarin orbited Earth in 1961. However, the one thing that has eluded scientists thus far is a rocket that can be used multiple times. Though that may not sound like a big deal, it is for companies that want to make suborbital travel available to everyone. That's because a large proportion of the cost goes towards building the rocket which only flies once. It is, therefore, no wonder that Blue Origin's successful launch and landing of the world's first reusable rocket is causing such excitement.