Alright, I can prove that humans have evolved. Taking bones from ancient bipedal apes, they extracted the DNA and mapped the genome. Then, during the Human Genome Project, they mapped the basic human genome (very difficult to figure out based on the project name, huh?). Comparisons revealed that we have incredible similarities to these ancient simians, thusly further investigation priced that we were in fact evolved from them. Proved, with science.