Randolph-Quinney, Patrick S., et al. “Response to Thackeray (2016) – The Possibility of Lichen Growth on Bones of Homo Naledi: Were They Exposed to Light?”. South African Journal of Science, vol. 112, no. 9/10, Sept. 2016, p. 5, doi:10.17159/sajs.2016/a0177.