References & Sources:

- First monkey–human embryos reignite debate over hybrid animals: https://www.nature.com/articles/d41586-021-01001-2

- Lab-grown embryos mix human and monkey cells for the first time: https://www.sciencemag.org/news/2021/04/lab-grown-embryos-mix-human-and-monkey-cells-first-time

- Scientists are making human-monkey hybrids in China: https://www.technologyreview.com/2019/08/01/652/scientists-are-making-human-monkey-hybrids-in-china/