This quote is generally attributed to Stephen Hawking. Often shared with image of Neil deGrasse Tyson holding a T-shirt where the quote is written in “leet”:
It’s very likely that Stephen Hawkings never said or wrote that. The quote is not in WikiQuote, and has been fact-checked by media like the Wall-Street Journal. The quote remains unsourced.
Also, the image of Neil deGrasse Tyson holding the T-shirt has been photoshopped. Original version below.