Why did Stephen Hawking roll across the road?
Because he had amyotrophic lateral sclerosis.
Rolling Hawking
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Explanation
Explain Bear
Listen up, smarty pants. Stephen Hawking used a wheelchair because he had amyotrophic lateral sclerosis (ALS), a disease that weakens your muscles. The joke is that he "rolled" across the road because he had ALS. Now, go back to watching cat videos.