Loss of ability to speak since 1985, how did Stephen Hawking talk to the world?
Let's meet75-year-old disease is still a mystery of American baseball legend
On his 36th birthday, Lou Gehrig was diagnosed with sclerosis on one side of his body, causing his body to become paralyzed and only live for another 2 years.Talk in the way of Professor Stephen Hawking
Since January 2015, the software to help English famous professor Stephen Hawking talk to people will be posted online for free.