Hawking and first wife Jane pose in 1990.

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Birth of an Icon: Hawking's Boyhood

Stephen Hawking was born in Oxford, England, on Jan. 8, 1942, on the 300-year anniversary of the death of Galileo. The family moved from Oxford to St. Albans, a town north of London, when Hawking was 8 years old. His father's routine research trips to Africa and his mother's left-leaning thinking made for a rather interesting upbringing. The fact that Hawking's parents used a former London taxi as the family car certainly drew attention, too.

Although Hawking's interest in math became apparent to him by his 14th birthday, it wasn't until college that he would delve into physics [source: White & Gribbin]. Hawking has famously admitted that he was a less-than-stellar student during his early years. His father, who excelled in medicine, wanted him to follow in his footsteps while Hawking attended University College, Oxford. But Hawking's interests would lead him elsewhere -- to the edge of the universe, you could say.

While studying physics at University College, he lived the life of most students, partaking in the university's rowing team and parties. Friends and colleagues recall his outgoing sense of humor and popularity during his youth [source: Ferguson].

But things would soon change after receiving his first degree and venturing to Cambridge for his doctorate.

First, Hawking's path crossed with that of Jane Wilde at a campus party in 1963, where the couple hit it off. They married in 1965. Second, the then 21-year-old was diagnosed with amyotrophic lateral sclerosis (ALS), the condition also known as Lou Gehrig's disease that damages nerve cells and negatively affects a person's ability to move. Even more shocking was Hawking's prognosis: At the time, his doctors told him he had roughly two years to live.

Suddenly, Hawking had a new outlook on life. He found a burst of vigor in pursuing his doctorate in cosmology at Cambridge University. This is where his contributions to physics really took root. With time, his work earned him 12 honorary degrees and the Lucasian professorship at Cambridge -- an honor once held by the likes of Isaac Newton and Charles Babbage.

Hawking and his first wife had three children before they divorced in 1991. He later married one of his caregivers, Elaine Mason, in 1995. The couple divorced in 2006, with lingering allegations of Mason abusing Hawking -- a situation he denied and refused to talk about to police [sources: Ferguson; The New York Times].

Friend and biographer Kitty Ferguson said Hawking carefully guards his personal life. Because he needs a voice synthesizer to communicate, Hawking is selective with what he says about certain topics. Concerning his first wife's decision to become romantically involved with another person, he said, "It was fine, as long as she went on loving him [Hawking]" [source: Ferguson].

Although Hawking has chosen to protect some of his personal life, he certainly doesn't skimp on voicing his ideas to the scientific community and media. Next, we'll get to the essence of his theories.