Why Most Alien Planets in Hollywood Movies Look the Same

London, England-based educational vlogger Tom Scott visits the outskirts of Los Angeles County, California to explain Hollywood’s “thirty-mile zone,” an area used to determine rates and work rules for entertainment industry union workers.

“There’s a reason that a lot of planets in American science fiction look the same: they’re all filmed in the same places. But why those particular locations? It’s about money, about union rules, and about the thirty-mile zone — or as it’s otherwise known, the TMZ.”

Previously from Tom: The World’s Most Frustrating Work of Art