As an Oxford student, Stephen Hawking never expected that people across the world would know his name, or that his hobby of stargazing would lead him to be one of the world's greatest scientists. Stephen Hawking made cosmology, or the study of the universe, accessible to everyone. He was diagnosed with amyotrophic lateral sclerosis at the age of twenty-one, but didn't let that stop him from receiving a graduate degree from Cambridge and going...