We all know about drug-sniffing dogs, but dogs can sniff out a ton of other things too. Recently the news has been filled with reports of dogs being able to sniff out cancer in people. While amazing, we shouldn’t be too surprised as dogs have had a long history of being able to sniff out all kinds of cool things. In fact, one might be better off making a list of things a dog can’t sniff out. It seems as though a dog can sniff out almost anything if properly trained. Here are some of the cooler ones.