That expression may be more than just a figure of speech. Throughout history, human beings have wondered about the mysteries of the body and the mind.
What if, in certain situations, our bodies pick up on signals that remain invisible to others? An intriguing possibility links our sense of smell… and intuition.
The human body: a system still full of mysteries
Our bodies function like incredibly precise machines. Breathing, heartbeats, emotions, reactions—everything seems orchestrated without us having to think about it. And yet, despite advances in research, some phenomena remain difficult to explain.
Among them is that feeling some people describe when a major change is approaching. Doctors have sometimes observed that seriously ill patients express a sense of calm or a need to say goodbye to loved ones. It’s unsettling—but deeply human.
This isn’t about predicting the future. Rather, it may reflect a heightened sensitivity to subtle signals the body detects even before the mind can put them into words.
The sense of smell: more powerful than we imagine
Our sense of smell is directly connected to areas of the brain associated with emotion and memory. That’s why a single scent can instantly take us back to a childhood moment—like the smell of a cake fresh out of the oven.
Researchers at the University of Kent explored an intriguing hypothesis: could our brains unconsciously detect certain molecules linked to biological changes in the body?
Psychologist Arnaud Wisman and his team conducted experiments involving a substance called putrescine, which is naturally produced during certain organic processes. Participants exposed to this odor—without knowing what it was—showed specific emotional reactions, often linked to mild discomfort or a heightened state of alertness.
An important point: the volunteers did not consciously associate the smell with any particular danger. It was the unconscious mind that seemed to respond first.
Intuition or simply biological sensitivity?
Does this mean the body “knows” everything in advance? Not exactly. Researchers speak instead of biological sensitivity. Our bodies are constantly picking up tiny pieces of information: hormonal fluctuations, physiological changes, barely perceptible odors.