 It might not look like much at first if you don't know what it is. And frankly, it's kind of hard to know what it is. But what it is is cave art in Indonesia that depicts a large pig surrounded by three human-like figures. The art itself is, you know, it's pretty good. But to a team of Australian and Indonesian scientists, what's really jaw-dropping is how old it is. They've analyzed the image and they say it's at least 51,200 years old, which would make it the world's earliest known example of cave art.