Researchers have combined various X-ray imaging technologies to create multi-contrast images that can be used to detect threatening materials such as explosives in thousands of complicated scenarios. The new approach, which also leverages readily available machine learning procedures for materials classification, could be useful for security screening as well as applications in the life and physical sciences.Researchers have combined various X-ray imaging technologies to create multi-contrast images that can be used to detect threatening materials such as explosives in thousands of complicated scenarios. The new approach, which also leverages readily available machine learning procedures for materials classification, could be useful for security screening as well as applications in the life and physical sciences.Security[#item_full_content]