znurg
Explanation
The Joke
Two aliens named Znurg and Zorgax are hovering in a flying saucer above what appears to be a prehistoric ocean shoreline. One alien exclaims "Oh, Znurg!" while the other scolds: "You dropped BOTH of them?! That was our dinner, Zorgax!" Below the saucer, two strange creatures -- small, multi-eyed beings with worm-like appendages -- are crawling onto the beach and into the water. The caption at the bottom reads: "Shortly before the Cambrian Explosion."
The joke proposes an absurd origin story for one of the most significant events in the history of life on Earth: the Cambrian Explosion, when complex multicellular life suddenly appeared in the fossil record roughly 541 million years ago. According to this comic, the rapid diversification of life was not the result of evolutionary pressures or environmental changes -- it happened because a clumsy alien accidentally dropped his takeout food onto primitive Earth.
The Humor
The comedy works by offering a hilariously mundane explanation for a genuinely mysterious scientific event. The Cambrian Explosion is one of the great puzzles of paleontology -- why did complex life appear so suddenly? The comic answers: alien food contamination. The aliens' argument is perfectly domestic and petty (one spouse scolding the other for dropping dinner), which contrasts beautifully with the cosmic significance of what just happened. The creatures being dropped are drawn to look appropriately bizarre and Cambrian-era -- like the weird, wonderful organisms found in the Burgess Shale fossils.
References
The Cambrian Explosion refers to the period approximately 541 million years ago when most major animal phyla appeared in the fossil record over a relatively short geological timespan (about 13-25 million years). The cause of this rapid diversification remains one of the most debated topics in evolutionary biology. The idea of panspermia -- life on Earth originating from extraterrestrial sources -- is a real scientific hypothesis, though typically it involves microorganisms rather than aliens dropping their lunch.