"voyage to the prehistoric planet" comparisons

have just stumbled on this on google news about the similarities in design between prometheus and alien, and an old russian sci-fi film... http://www.shadowlocked.com/201203302484/opinion-features/the-russian-heritage-for-ridley-scotts-prometheus.html the plot thickens when you read the plot synopsis on imdb of the 1965 roger corman re-release of the film... http://www.imdb.com/title/tt0059887/plotsummary ooo indeed, more comparisons to ponder obsessively :D