On Stephen Hawking's 80th birth anniversary, Google gave tribute him with an animated video on Google's homepage.

“My goal is simple,” he once said. “It is a complete understanding of the universe, why it is as it is and why it exists at all.”

Google's doodle video shows Hawking’s life and work, with a narration by the scientist himself that was generated with the approval of his kin.

The Google Doodle was illustrated by artist Matthew Cruickshank, and they confirmed that the voice of Stephen Hawking was generated and used in the Doodle with the approval of the Hawking estate.

Stephen Hawking intended to showcase that he never allowed the challenges of his physical condition to limit his power of expression.