World renowned theoretical physicist who made many discoveries in physics, mathematics, and cosmology, Stephan hawking, died at the age of 76 on Wednesday.

Hawking, a professor at the University of Cambridge, is better-known for his works involving black holes and theory of relativity, CNBC reported. 

 Hawking suffered for most of his life from amyotrophic lateral sclerosis, also known as ALS or Lou Gehrig's disease. The condition normally causes nerve cells in the brain and spinal cord to degenerate.

While ALS usually kills sufferers within the first few years, Hawking survived the disease for decades. His early encounter with the disease during his younger years was depicted in the film "The Theory of Everything" in 2014.

Recently Hawking warned vocally about the dangers posed by artificial intelligence. Last year, he said A.I. could be the "worst event in the history of our civilization."