"The decision to take a human life should never be delegated to a machine."
Boston Dynamics, an offshoot of MIT, said it wants to build machines that "break boundaries and work in the real world."
More than 50 AI researchers from around the world have signed an open letter boycotting the prestigious university.
Micah Johnson was killed after a robot delivered and detonated a bomb.
More than 1,000 artificial intelligence experts signed an open letter calling for the ban of fully autonomous weapons.
"Our future is a race between the growing power of technology and the wisdom with which we use it," says Hawking.
Humanity is on the cusp of developing fully autonomous weapons capable of picking their own targets.