How can we be sure anything outside of our minds actually exists? That the world outside of our thoughts is a reality? We can't, we just accept that it probably is real. I also accept that with the same degree of probability there is no god or gods.
Evidence for evolution. Well, the evidence for the fact of evolution is overwhelming. Here's one... The earth's rotation slows down by 2 seconds every 100,000 years. We can predict then that 380 million years ago each year would have been about 396 days and each day about 22 hours. Coral fossils from ground that has been radio-metrically dated to 380 million years back confirm, by daily growth rings and yearly growth rings, that the year was in fact 400 days long and each day in fact 21.9 hours long. All close enough to confirm that our dating systems, regarding the age of the earth, are valid.
The radiometric system agrees with the tidal drag theory's calculations. No creationist can argue against that without committing a fallacy.
Now, the Cambrian dates back from 543 million years ago - worms, sponges, jelly fish then along toward up to 250 million years ago we had Jawed fish and land plants, tetrapods, reptile's and finally mammals. Then birds with mammals through the Jurassic. Finally, very very recently, humans branch from other primates.
With the entire course of evolution pressed into a single year - the earliest bacteria appeared in march and the humans at 6am on December 31st. The Golden age of Greece just 30 seconds before midnight. Now, where was the worship of God at 6am on December 31st and why does the bible fail hopelessly anachronistically?
Do you want to know why evolution is a fully fledged theory on equal standing to the theory of gravity or the theory of ohms law? Look up the predictions made regarding intermediate species between Acanthostega Gunnari and Eustenopteron Foordi from 365 and 385 million years ago.