The tongue can't, but the nose certainly can. Some recent research[0] puts the number of unique human-discernible scents at around one trillion. [0]: https://w

The tongue can't, but the nose certainly can. Some recent research[0] puts the number of unique human-discernible scents at around one trillion. [0]: https://www.nih.gov/news-events/nih-research-matters/humans-can-identify-more-1-trillion-smells https://www.nih.gov/news-events/nih-research-matters/humans-...