Fill in the Blanks A Thinker Who Can't Talk or WalkOnline version LL Comp Build Know, Heroes, A Thinker Who Can't Talk or Walk by Stephanie Turner 1 about universe ever disease What can you do if you can't talk or walk ? Stephen Hawking has a that makes speaking and walking very difficult . But he can still think many things . When did the begin ? How did it begin ? Will it end ? He uses special machines to write and speak . He is known worldwide as one of the greatest thinkers of our times .