As the number of cargo ships has increased, so has a problem: workers stuck on ships that have been completely abandoned by the owners, leaving them stranded out at sea without basic supplies like food.

Priceless cultural artifacts have been plundered and sold for hundreds of years. You can find these relics in museums and in private collections. In recent years, with the advent of online marketplaces, researchers have begun to find a lot of artifacts for sale on the web. And it turns out, ISIS profits from much of it.