Daftar Pustaka :
https://www.nature.com/articles/s41559-018-0625-0
https://science.ubc.ca/news/do-bacteria-ever-go-extinct-new-research-says-yes-bigtime
https://www.vocabulary.com/dictionary/bacteria
https://explorable.com/discovery-of-bacteria
National Research Council (US) Committee on Scientific Issues in the Endangered Species Act. "Species Extinctions: Extinctions Over Geological Time." NCBI. U.S. National Library of Medicine, n.d. Web. 27 Sept. 2016.
https://www.nationalgeographic.com.au/history/why-did-the-woolly-mammoth-die-out.aspx
https://www.int-res.com/articles/esr2007/3/n003p205.pdf
http://www.bbc.com/earth/story/20150211-whats-the-most-dominant-life-form
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4187170/