I love this quote from the abstract: Diffuse interstellar H atoms are the ultimate cosmic space mines and represent a formidable obstacle to interstellar t

I love this quote from the abstract: Diffuse interstellar H atoms are the ultimate cosmic space mines and represent a formidable obstacle to interstellar travel. The paper[1] is an interesting read too, but of course there are other obstacles to relativistic spaceflight, such as reaching velocities capable of relativistic spaceflight. [1] - http://www.scirp.org/journal/PaperDownload.aspx?paperID=23913&returnUrl=http%3a%2f%2fwww.scirp.org%2fJournal%2fHome.aspx%3fJournalID%3d69 http://www.scirp.org/journal/PaperDownload.aspx?paperID=2391...