Terry Bisson (Hugo and Nebula Award Winner) wrote a hilarious short called, “They?re made out of meat“. Stephen O’Regan filmed the short story which later won Grand Prize at the Science Fiction Museum’s SF Short Film Festival in Seattle in February of this year. You can view it here. If it doesn’t work you can try viewing it on Atom Films or on You Tube. If the video doesn’t work, you can read the story and use your imagination.