A brief history of Stephen Hawking's time on planet Earth in one graphic

REUTERS/Lucas Jackson

Physicist Stephen Hawking sits on stage during an announcement of the Breakthrough Starshot initiative with investor Yuri Milner in New York April 12, 2016.

Stephen Hawking was a theoretical physicist who pioneered new understandings of black holes, the universe, and how much one person can achieve.

Hawking died early in the morning on March 14, 2018 - Pi Day and Albert Einstein's birthday.

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In passing, he left behind an incredible legacy, especially as a person who struggled with ALS, a neurodegenerative disease that confined him to a wheelchair for the vast majority of his life.

Though Hawking's life has filled many books and a feature-length film, we've summarized some of the most memorable and notable moments in the graphical timeline below.

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Remembering Stephen Hawking:

• Stephen Hawking has died at 76 - here are some of the most remarkable and memorable things he ever said
• These 15 photos show how Stephen Hawking defied his disability and lived an incredible life
• Stephen Hawking was only expected to live a few years after being diagnosed with ALS at age 21 - here's what the disease is
• Stephen Hawking died on a day that is cosmically connected to Albert Einstein and Pi
• The man who helped Stephen Hawking achieve his lifelong dream of experiencing zero gravity remembers what it was like to watch the acclaimed physicist break free of his wheelchair
• Stephen Hawking was rumored to run over the toes of people he didn't like with his wheelchair
• Stephen Hawking had a 'sense of humor as vast as the universe': unique tributes flood in for esteemed scientist