The 'Dinosaurs dying by asteroid' meme draws inspiration from an imaginative collision of the prehistoric era with the futuristic concept of astronauts wielding advanced weapons. This absurd scenario flips the traditional narrative of dinosaurs becoming extinct due to a natural event, like an asteroid impact, by introducing an astronaut as an executor. The image humorously suggests that some cosmic authority or powerful being decided to end the dinosaurs' reign prematurely. It's the juxtaposition of these two disparate timelines and the whimsical idea of an astronaut being responsible for such an event that catapulted this meme into popularity.