For me, this is one of the best science fiction movies ever made. It’s a horror show with high tension and enough melodrama to ensure a barbiturate is needed thereafter.
A durable microscope alien life-form that can survive in extreme habitats till it finds a suitable host. That is a great concept, with Space an inhospitable nightmare for organisms. Why not have a malevolent alien be a shape shifting gore infested virus. It makes sense.
The 2011 Prequel also called ‘The Thing’ was a very well done introduction to John Carpenter’s classic.