A glass container filled with honeybees sounds like a strange tool for detecting cancer, but because of the bees' extraordinarily sensitive sense of smell, it could be an incredibly useful tool. The device, created by Portuguese designer Susana Soares and presented last month at Dutch Design Week, consists of two glass chambers: a small one, which starts off empty, surrounded by a larger container that has bees placed in it. The patient breathes into the smaller chamber, and if the bees fly into it once they can smell the patient's breath, that means the patient is most likely ill. Bees can be trained to recognize chemical smells -- including the biomarkers that indicate cancer and other serious disease, such as tuberculosis -- and once they've learned the scent, they never forget it. They can even be trained in as little as 10 minutes, Soares said, and are "very accurate" when it comes to detecting diseases.