Stephen Hawking may have passed away, but his legacy of scientific discovery will live on, and his final paper has the potential to lay the groundwork for one of the most important scientific discoveries of the 21st century. The Sunday Times reports that the paper, entitled “A Smooth Exit from Eternal Inflation,” details a means by which scientists could discover a parallel universe.The paper had its latest revisions approved on March 4 — 10 days before Hawking’s death.