Beautiful artworks can fetch a pretty penny, and the older those artworks are the better. Who wouldn't want to have a relic of the Roman Empire gracing your home? A lot of people have those, and they also have no clue that it's liable to be faked. It happens to museums as well as private owners. Yeah, there's a lot of money in the trade of ancient art, but even more in forgeries, because it can be done again and again, as long as you aren't caught. Strangely, it takes a lot of hard work and talent to make convincing fakes, which gives us a clue to how much money is involved.
But there are professionals who can spot forgeries with a bit of study. Fake hunters have to be knowledgeable in not only real art, but the cultures from which it comes. They also need to know chemistry, metallurgy, industrial history, and a host of other disciplines to determine if an ancient work of art is genuine or manufactured more recently. Half as Interesting gives us a crash course in how they do it. The story of art forgeries is a minute and a half shorter than this video would indicate.