A snerk. "You ain' nothin' but a grub. A'ight...so...back before th' Resurgence, bunch o' tinkerers start musin' NASA types fer ideas 'bout how to get further 'n th' moon. Course, moon ain' even been got to yet at that point, but still...think big, right? So the NASA guys never go nowheres with it, but all these writers does. Bussard ram jet: like a great big cone what scoops up hyrdogen in space, compress it down tight, then use it for fuel. Put one of 'em on th' front of yer spaceship, an' once ya get the thing movin' in space it jus' keep powerin' its damn self."