(CNN) -- Scientist and author Stephen Hawking is "very ill" and has been hospitalized, according to Cambridge University, where he is a professor.
Hawking, 67, is one of the world's most famous physicists and also a cosmologist, astronomer, and mathematician.
Wheelchair-bound Hawking is perhaps most famous for 'A Brief History of Time.'
Hawking has Lou Gehrig's Disease (Amyotrophic Lateral Sclerosis, or ALS), which is usually fatal after three years. Hawking has survived for more than 40 years since his diagnosis.
A Cambridge University spokesman told CNN: "Professor Hawking is very ill and has been taken by ambulance to Addenbrookes Hospital in Cambridge."
Professor Peter Haynes, head of the university's department of Applied Mathematics and Theoretical Physics, said: "Professor
Hawking is a remarkable colleague, we all hope he will be amongst us again soon."