In 1966 Shklovskii and Sagan proposed that life on Earth may have been seeded through directed panspermia by other civilisations.
directed | directed graph | Directed-energy weapon | ''What's Wrong With Angry?'' Poster for the 2008 Edinburgh Fringe production directed by Patrick Wilde | Shia LaBeouf in the video for "Fjögur Píanó" directed by Alma Har'el | Scene from '''Stanley Keyes''' play ''Dragon Slayers,'' directed by Brad Mays | Directed graph | Directed acyclic graph | Directed | Deborah Winters (left) and Gary Grimes (right) star in the Warner Bros production '''''Class of '44''''', directed by Paul Bogart |