In 1866, a German scientist and strong supporter of Darwin, Ernst Haeckel, got into trouble for faking evidence. He supposedly showed that developing embryos go through the earlier evolutionary stages of their species. His drawings even showed the human fetus with "gill slits" like a fish. The scientific community investigated his so-called discovery and found that he had faked his drawings.
Unfortunately, textbooks today – well over a century later – still present this faked evidence in support of evolution.
While no scientist today believes that the developing human fetus has "gill slits", few scientists have the courage to speak out because it might make them appear to oppose evolution.
Video here https://www.youtube.com/watch?v=ecH5SKxL9wk