References

1.  Mora, C., Tittensor, D. P., Adl, S., Simpson, A. G. B. & Worm, B. How Many Species Are There on Earth and in the Ocean? PLoS Biol 9, 1001127 (2011).

2. Ceballos, G. et al. Accelerated modern human-induced species losses: Entering the sixth mass extinction. Sci. Adv. 1, (2015

3. Small, E. The new Noah’s Ark: Beautiful and Useful species only. Biodivers. - Life Earth 12, 232–247 (2011).

4. Estren, M. J. The Neoteny Barrier: Seeking Respect for the Non-Cute. J. Anim. Ethics 2, 6–11 (2012).

5. Small, E. The new Noah’s Ark: beautiful and useful species only. Part 2. The chosen species. 13, 37–53 (2012).