Neil deGrasse Tyson is a well-known American astrophysicist and science communicator whose interviews, talks and television appearances are frequently clipped and shared online. His expressive laugh has become a familiar reaction in meme culture because it reads instantly as amused disbelief, even without context. Short soundboard versions circulate through reaction videos, comedy edits and social posts, where creators use the brief laugh to punctuate a joke or an unexpected moment. Its appeal endures because the reaction is warm, recognisable and easy to drop into almost any light-hearted edit.