[raffraffraff]

You won't find documented evidence for all of the species we've killed off, but that doesn't mean we haven't been doing it since prehistoric times. Within living memory (and just outside of it) humans have made many species extinct simply for fun. Buffalo had an extremely narrow escape. We've killed off species by not managing their numbers. We've killed off yet more because we saw them as pests. We've also killed off species to make way for others, or to kill a food source for a species (or race) that we didn't like. Extinction is something were fucking good at. Demanding documented evidence for it is a bit like the "clearing the decks" logical fallacy. I would err on the side of assuming that extinctions are caused by humans, rather than assuming that they're not.

However, if there is documented proof it would make interesting reading, so...

[datameta]

If you were to scroll down just a bit you would see my comment showing I am fully aware of anthropogenic biosphere changes. I asked for a source out of curiosity, not to set up a trap of some sort.