Question

what are the inventions/discoveries of Stephen Hawking?

Answer 1

pressure cooker hope it helps you mr

Answer 2

$the \:following \:are \:the \:major \:discoveries$

$\:of \:stephen \:hawkings$

1. Singularities – 1970

2. Laws of Black hole mechanics – 1971-72

3. Cosmic Inflation Theory – 1982

4. Model on the wave function of the Universe – 1983

5. "A Brief History of Time" his famous book published on 1988
In this book he explains about the range of subjects in cosmology like big bang, black holes, light cones etc. 

6. Top-Down Theory on Cosmology – 2006