Unicellular organisms appeared on earth. That was last September. Not much else happened until around the end of June, when all of a sudden the oceans were just teeming with trilobites and other arthropods. Near the middle of July, animals appeared on land for the first time. Centipedes, mostly, with a few arachnids thrown in for variety. The first week of August there were actual amphibians and reptiles on land, some as big as eight inches long. A couple of weeks later and there were dinosaurs like the diplodocus which could be a hundred feet long. The diplodocus, though, only hung around from about 7:00 to 8:00 AM on August 20. On Labor Day the Tyrannosaurus appeared, and it seemed like a really big deal, but it hung in even less time than the diplodocus, about twenty-five minutes. Last Tuesday you probably noticed all those mammals that were suddenly everywhere. That was the paleogene period. Sometime late Thursday night, there were primates. Just before I woke up this morning, there were humans. A minute ago, someone painted some bison and what-not on a cave in France. Six seconds ago Homer wrote the Odyssey.
We say Homer is one of the immortals.