(Older post for context)
And then I was treated to these two stories based on research from this supplement of PNAS. Leakey and Lewin have said before that we have been responsible for extinctions in the past. I think the setting for their scenario was in Africa. A paper from the PNAS issue has a similar theory based on new evidence implicating humans in the extinction of Tasmanian megafauna. Giant sloths, giant kangaroos, marsupial rhinos, leopards, that no longer walk this earth at least partially due to our ancestors.
And then another paper, that implicates us in an ongoing one, that of the amphibians. Where we exacerbate the effects of the fungus that is affecting them through global warming. These animals that have survived four mass extinctions, are too fragile for human messes.
One can only wonder when it's going to be our turn.