Earth's sixth mass extinction event under way, scientists warn | Environment | The Guardian
https://www.theguardian.com/environment/2017/jul/10/earths-sixth-mass-extinction-event-already-underway-scientists-warnFrom Neandertals to modern humans: New data on the Uluzzian
https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0196786How many early human species existed on Earth?
https://www.livescience.com/how-many-human-species.htmlInbreeding, Allee effects and stochasticity might be sufficient to account for Neanderthal extinction
https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0225117Inbreeding, Allee effects and stochasticity might be sufficient to account for Neanderthal extinction : science
https://www.reddit.com/r/science/comments/e2yngk/inbreeding_allee_effects_and_stochasticity_might/Neanderthal extinction - Wikipedia
https://en.wikipedia.org/wiki/Neanderthal_extinctionNeanderthals Leave Their Mark on Us - The New York Times
https://www.nytimes.com/2014/01/30/science/neanderthals-leave-their-mark-on-us.htmlNeanderthals in Europe Died Out Thousands of Years Sooner Than Some Thought, Study Says - The New York Times
https://www.nytimes.com/2014/08/21/science/neanderthals-in-europe-died-out-thousands-of-years-sooner-than-some-thought-study-says.htmlQuantifying the potential causes of Neanderthal extinction: Abrupt climate change versus competition and interbreeding - ScienceDirect
https://www.sciencedirect.com/science/article/pii/S0277379120302936Were other humans the first victims of the sixth mass extinction?
https://theconversation.com/were-other-humans-the-first-victims-of-the-sixth-mass-extinction-126638Why Did the Neanderthals Go Extinct? It May Come Down to Brain Size | Inverse
https://www.inverse.com/article/44234-neanderthals-extinction-brain-shape-difference-cerebellum