What the researchers have discovered is a so-called organelle inside nerve cells, that has not previously been observed.
When you smell the fragrance of an orange, for example, it is your memories that create the exact scent.
The food you ate just before you walk past the bakery may impact your likelihood of stopping in for a sweet treat.
This is the first study to show that just the smell of a cooperating individual rat is enough to trigger an altruistic and helpful response in another.
Weizmann Institute of Science researchers have managed to strip much of the mystery from even complex blends of odorants.
Unhealthy behaviours trigger moral judgements that are similar to the basic emotions that contribute to our ability to survive.