Intelligent Creatures on Jupiter

The advanced intelligent life forms of the Jupiter civilization are actually puppets of consciousness parasitized by the roots of giant trees. Trees control all residents through their root network, making them mistakenly think they are living in a free utopia. In fact, they are just tools for trees to absorb the energy of the universe. Until an Earth astronaut accidentally broke in and discovered that all the "residents" were connected to the backs of their necks by luminous roots. That utopia is a continuously operating concentration camp covering the entire planet.