This is a description of Poa
About 66 million years ago, an asteroid collided with Earth, and most of the species on the planet died....
Except, in this world, it didn't. Poa is an alternate universe in which the K-Pg extinction didn't happen. The asteroid missed the planet by the interstellar equivalent of a hair's breadth, and the dinosaurs and other life continued to live and evolve. And one species of dinosaur became as intelligent as humans are in our world.