NEW YORK -- When Hollywood does biopics on musicians, we're used to lots of saucy tales of sex, drugs and rock ‘n’ roll. Not so much when it comes to astronauts.That changes with “The Real Stuff,” an eight-part National Geographic scripted series that shows the often ugly birth of American space exploration.“Astronauts are treated like gods in our culture and they’re unique in that way,” said writer, showrunner and producer Mark Lafferty.