'''Den sjette store massedød'''  er en betegnelse for tabet af plante- og dyrearter,  som  forskere mener, at mennesker i vor levetid står midt i, og at den er forårsaget af menneskelige aktiviteter.<ref>[https://videnskab.dk/miljo-naturvidenskab/den-sjette-masseuddoen-jordens-liv-forsvinder-lidt-efter-lidt Den sjette masseuddøen: Jordens liv forsvinder lidt efter lidt. Videnskab.dk 2014]</ref><ref>{{Cite web |url=https://www.businessinsider.com.au/signs-of-6th-mass-extinction-2019-3 |title=17 signs we're in the middle of a 6th mass extinction. Business Insider 2019 |access-date= 7. maj 2019 |archive-date= 7. maj 2019 |archive-url=https://web.archive.org/web/20190507045651/https://www.businessinsider.com.au/signs-of-6th-mass-extinction-2019-3 |url-status=ok }}</ref><ref>{{Cite web |url=http://www.sciencealert.com/it-s-official-we-re-on-the-brink-of-earth-s-sixth-mass-extinction |title=It’s official: scientists say we're entering Earth's sixth mass extinction. Science Alert |access-date=22. juni 2015 |archive-date=22. juni 2015 |archive-url=https://web.archive.org/web/20150622154124/http://www.sciencealert.com/it-s-official-we-re-on-the-brink-of-earth-s-sixth-mass-extinction |url-status=ok }}</ref><ref>{{Cite web |url=http://theconversation.com/earths-sixth-mass-extinction-has-begun-new-study-confirms-43432 |title=Earth’s sixth mass extinction has begun, new study confirms. The Conversation |access-date=11. juli 2015 |archive-date=12. juli 2015 |archive-url=https://web.archive.org/web/20150712151040/http://theconversation.com/earths-sixth-mass-extinction-has-begun-new-study-confirms-43432 |url-status=ok }}</ref><ref>{{Cite web |url=https://www.nytimes.com/2018/11/27/magazine/insect-apocalypse.html |title=The Insect Apocalypse Is Here. What does it mean for the rest of life on Earth? New York Times 2018 |access-date=28. november 2018 |archive-date=28. november 2018 |archive-url=https://web.archive.org/web/20181128164647/https://www.nytimes.com/2018/11/27/magazine/insect-apocalypse.html |url-status=ok }}</ref>
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