Stephen Hawking was a English theoretical physicist and cosmologist. He died recently.
He was quite famous I believe, do you know what disease he was afflicted by?
He was born in 1942 and held academic positions at Cambridge. He suffered from motor neuron disease.
Oh interesting, do you know if his motor neuron disease had a more formal name? I swear I've heard it referred to by something else.
There are several names given to it, like MND. Its origins are not yet known.
Interesting, now that I think of it I think it's called amyotrophic lateral sclerosis, do you know much about that?
Amyotrophic lateral sclerosis
Amyotrophic lateral sclerosis (ALS), also known as motor neurone disease (MND) or Lou Gehrig's disease, is a specific disease that causes the death of neurons controlling voluntary muscles. Some also use the term motor neuron disease for a group of conditions of which ALS is the most common. ALS is characterized by stiff muscles, muscle twitching, and gradually worsening weakness due to muscles decreasing in size. It may begin with weakness in the arms or legs, or with difficulty speaking or swallowing.
his boards capable of 100 distinct variations altogether. 
Besides circular chess, Bhati has developed a ramp system enabling easy access to vehicles for the disabled. In 2014 he was presented a Dr. Batra's Positive Health Award by Mahendra Singh Dhoni.
Bhati suffers from Duchenne muscular dystrophy and uses a wheelchair. He credits his passion for invention to his admiration of British physicist Stephen Hawking: "I want to be like Hawking who became a famous scientist despite suffering from motor neuron disease."
Six-player circular chess.