The doctor who diagnosed me with ALS, or motor neuron disease, told me that it would kill me in two or three years.
Stephen HawkingOur population and our use of the finite resources of planet Earth are growing exponentially, along with our technical ability to change the environment for good or ill.
Stephen HawkingTime and space are finite in extent, but they don't have any boundary or edge. They would be like the surface of the earth, but with two more dimensions.
Stephen Hawking