I was homeschooled in a particular conservative area. Much of what I have been taught was... woefully inadequate, we'll say. Lots of my learning has come in university and afterwards, so what I've picked up is pretty obviously incomplete and leaves me with many unknown unknowns in this area. Today has begun filling in many of those gaps so they get to be known unknowns now!

https://en.wikipedia.org/wiki/Veronika_(cow) might be a better Wikipedia link.

Honestly I would have expected a pig or horse to be discovered to use tools, rather than a cow. Cattle are generally... not thought of as particularly intelligent.