Stephen Hawking, the visionary physicist who wrote A Brief History of Time and dedicated his life to exploring and explaining the mysteries of the universe, has died at 76. CNN reports: Hawking suffered from ALS (amyotrophic lateral sclerosis), a neurodegenerative disease commonly known as Lou Gehrig’s Disease, which is usually fatal within a few years. … Continue reading Visionary Physicist Stephen Hawking Dead at 76