Brain Spawn
From Futurama Wiki
The Brain Spawn were a sentient species that invaded the planet Earth during the 31st Century. They looked similar to human brains, and used telekinesis to move around. The species had an ability to make people stupid—the only one immune to this power was Philip J. Fry, due to lacking a certain brain wave after traveling in time and becoming his own grandfather.
After their initial defeat on Earth, the Brain Spawn began constructing a massive Infosphere, where they collected all the information in the universe. They planned to destroy the universe (to stop the creation of any new information) once the task had been completed, but were foiled by Fry and the Nibblonians.
