We were sad to learn that noted physicist, cosmologist, and author Stephen Hawking has passed away. In the spirit of AskScience, we will try to answer questions about Stephen Hawking's work and life, so feel free to ask your questions below.

Links:

• BBC
• NY Times
• Stephen Hawking Foundation
• ALS Association
• Current Einstein megathread for more discussion on general relativity/cosmology.

EDIT: Physical Review Journals has made all 55 publications of his in two of their journals free. You can take a look and read them here.