Crows have been shown to understand the concept of zero
The more I learn about animal intelligence, the more I suspect we grossly underestimate it.I recently saw a video of a seagull that entered a grocery store through the automatic door, picked up a (non-transparent) bag of potato chips (or something similar), walked out again, opened the bag and ate the chips. Think about it for a moment, the bird has to understand (to a degree) how an automatic door works, and that there is food inside these shiny bags. When let that sink in, I was thoroughly impressed. I knew seagulls are very opportunistic eaters, but I did not know they were capable of this degree of intelligence and planning.I wonder how much more there is discover, and how that might affect how we view and more importantly treat animals. We might have to rethink our relationship with them.