I need your help identifying a movie. If I recall correctly it was about some cosmonauts being stranded on a distant planet where something they assumed was a plant started to mimic Earth lifeforms. I'm not sure but in this movie Earth might have been destroyed and they are the only ones left.
Edit: This was a Hollywood movie. They were left on the planet and all planet was filled with this grass-like plant. After some time they started to 'see' things which they believed to be hallucinations, because those were images from their past. In the end it was the 'planet' itself making itself more and more like Earth basing on memories of the astronauts.