The final book from Stephen Hawking, the late theoretical physicist and cosmologist, was released Tuesday under the title Brief Answers to the Big Questions.
Hawking, who lived most of his life with the neurodegenerative disorder amyotrophic lateral sclerosis (ALS), was still working on the book when he died in March. The work was completed by his family and publishers, who filled in the gaps by drawing on an “enormous personal archive” of essays, interviews and articles from Hawking’s half-century career.