Scientist Stephen Hawking 'very ill'

LONDON, England (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.

On his Web site, Hawking has written about living with ALS. "I try to lead as normal a life as possible, and not think about my condition, or regret the things it prevents me from doing, which are not that many," he wrote.

He added: "I have been lucky, that my condition has progressed more slowly than is often the case. But it shows that one need not lose hope."

Hawking has been married twice. His Web site says he has three children and one grandchild.

Hawking was born on what turned out to be an auspicious date: January 8, 1942 -- the 300th anniversary of the death of astronomer and physicist Galileo Galilei.

A Cambridge University spokesman told CNN: "Professor Hawking is very ill and has been taken by ambulance to Addenbrookes Hospital, 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."

Hawking has guest-starred, as himself, on Star Trek: The Next Generation and The Simpsons. He also said if he had the choice of meeting Sir Isaac Newton or Marilyn Monroe, his choice would be Marilyn.