This HND piece looks at olfaction, and notes how it can conjure up vivid memories. Some have asked: Why can't this phenomenon be used forensically?
We report on interesting work, just published, that suggests that humans can perform pretty well in a scent lineup, but strangely, the ability to discriminate between odors diminishes rapidly with time.
Another study is cited, which links PTSD with odors. We also mention a case of canine scent tracking gone very wrong.
Read the complete article.