Te fossil record as yet to provide a single bridge animal demonstrating transition from one creature to another. Without this there is no evidence of evolution. We know that animals change their characteristics based on disparate gene pools. Some fish of the same species may vary considerably as remote populations.
Science long ago gave up Darwin as a solid bedrock set of scientific principles. The notion of gradual change over millennium remains a decided belief. The difficulty is there is no hard evidence that monkeys became man or that fish learned to walk on land. There are no transition fossils showing these changes are linked.
There are a number of gradual demonstrations of species evolution. A classic example shown in a number of museums is the evolution of horses. Starting with the very small 5 toed creature of 20 or more million years ago to the very large one hoofed creature of today. There are lobe finned fish today which can crawl through the mud from one drying pool to another. There is also the DNA evidence which shows more distance from Gorilla to man, less from Chimp to man, and even less from Bonobo to man. The wall of skulls of the hominid line at the Smithsonian Inst. is a fascinating view of the gradual changes over 5 or 6 million years to modern man.