And renowned British physicist Stephen Hawking has died. He was 76 years old. His family released a statement in the early hours of Wednesday morning confirming his death at his home in Cambridge in the UK. Hawking was known for his ground-breaking work with black holes and relativity. He was diagnosed with motor neurone disease in 1963 when he was just 21. - at the time doctors gave him just a few years to live. Here's a look back now on his life.