American society for microbiology: https://www.asm.org/

Darwin Online: http://darwin-online.org.uk/majorworks.html

International society for microbial ecology: “about microbial ecology:”  https://www.isme-microbes.org/what-microbial-ecology

International Union for the Conservation of Nature (IUCN): https://www.iucn.org/

National Academy of Sciences: http://www.nasonline.org/

National Center for Science Education: https://ncse.com/

Natural History Museum of Los Angeles County: https://nhm.org/site/

The Museum of Vertebrate Zoology at Berkeley: http://mvz.berkeley.edu/index.html

The Tree of Life Web Project: http://tolweb.org/tree/phylogeny.html