After Hawking was diagnosed with amyotrophic lateral sclerosis (ALS) at 21 years of age, he was forced to balance the stresses of academic life with physical illness. The disease negatively affects brain and spinal neurons, making patients lose control of voluntary motor function and movement.
During the first few years, his condition worsened rapidly. Soon he relied on a wheelchair. By 1974, Hawking was unable to feed himself. Fortunately, the progression of the disease slowed a bit, eventually becoming more gradual over the years. With time, however, he still began losing the use of his voluntary muscles, hands and certain facial expressions.
Hawking previously used his finger to control a computer and voice synthesizer. But once he lost use of his hands, he started depending on twitching a cheek muscle to communicate. Most computers designed for him relied on running lists of words. Whenever the cursor reached a word or phrase he wished to use, Hawking twitched his cheek muscle to select it. Then he'd go on to the next word until he created a sentence. In the 1990s, by selecting words with his finger, he could pick 10 to 15 words per minute. But with the difficulty of twitching a cheek muscle, he could select just about one word per minute [source: Ferguson]. Because of this, most of Stephen Hawking's speeches and interviews were done in advance to save time.
Hawking died at age 76 at his home in Cambridge, leaving behind three children and three grandchildren. "He once said, 'It would not be much of a universe if it wasn't home to the people you love.' We will miss him forever," said his children in a joint statement released after his death in 2018. A 2014 movie about his life, "The Theory of Everything" won an Oscar for Eddie Redmayne who portrayed him.
For more information about Stephen Hawking and his work, check out the next page.
Last editorial update on Mar 14, 2018 12:11:00 pm.
More Great Links
- BBC News. "Hawking Takes Zero-Gravity Flight." April 27, 2007. (Jan. 20, 2012) http://news.bbc.co.uk/2/hi/6594821.stm
- Cartwright, John. "Information Paradox Simplified." PhysicsWorld.com. Aug. 15, 2011. (Jan. 26, 2012) http://physicsworld.com/cws/article/news/46848
- "Exploring Stephen Hawking's Unfettered Mind." NPR's Fresh Air. Jan. 3, 2012. (Jan 12, 2012) http://www.npr.org/2012/01/03/144312546/stephen-hawking-exploring-an-unfettered-mind
- Fahy, Declan. "Media Made Hawking Famous." Columbia Journalism Review. Jan. 11, 2012. (Jan. 12, 2012) http://www.cjr.org/the_observatory/media_made_hawking_famous.php?page=all
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- Sapsted, David. "Hawking and Second Wife Agree to Divorce." The Telegraph. Oct. 20, 2006. (Jan. 12, 2012) http://www.telegraph.co.uk/news/uknews/1531891/Hawking-and-second-wife-agree-to-divorce.html
- Shiga, David. "Hawking Radiation Glimpsed in Artificial Black Hole." New Scientist. Sept. 28, 2010. (Jan. 26, 2011) http://www.newscientist.com/article/dn19508-hawking-radiation-glimpsed-in-artificial-black-hole.html
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- The New York Times. "Stephen Hawking Denies Reports That He is a Victim of Abuse." Jan. 24, 2004. (Jan. 20, 2012) http://www.nytimes.com/2004/01/24/world/stephen-hawking-denies-reports-that-he-is-a-victim-of-abuse.html
- U.S. National Library of Medicine. "Amyotrophic Lateral Sclerosis." PubMed Health. Aug. 27, 2010. (Jan. 12, 2012) http://www.ncbi.nlm.nih.gov/pubmedhealth/PMH0001708/
- White, Michael & Gribbin, John. "Stephen Hawking: A Life in Science." Joseph Henry Press. Washington D.C. 2002.