Nail polish can be harsh on skin and nails. Acetone can also remove artificial nails made of acrylic or cured gel. A less harsh nail polish remover is ethyl acetate, which often also contains isopropyl alcohol. Ethyl acetate is usually the original solvent for nail polish itself. Acetonitrile has been used as a nail polish remover, but it is more toxic and potentially more carcinogenic than the aforementioned options. It has been banned in the European Economic Area for use in cosmetics since 17 March 2000. The health risks associated with nail polish are disputed. According to the U.S. Department of Health
Science of smells Science of smells The odorology or science of smells is a technology used mainly in criminology for judicial identification. The technology is based on the analysis of smells by dogs notably to merge the criminals or to identify the smell of objects (explosives, drugs). Olfaction of dogs is used for a long time by the police (location of drug, of explosives, of weapon, body of missing persons, criminals' identification) or the services of rescue (bodies buried under avalanches). From 1910, a dog handler Friedo Schmidt describes in his book Verbrecherspur und Polizeihund («The criminal links and the police dog») how