Last, but not least, is the good ol’ olfactory perception sense. Smell happens in humans when the brain receives signals after molecules in the air bind to sites on olfactory receptors.
- Every person smells things differently. This is because of the over 900,000 genetic variations of olfactory receptors. That lemon cake you smell and rave about to your friend? It might smell more like the inside of a shoe to your friend.
- Good smells make you happier!
- Dogs recognize and identify humans first by scent.
- Odors can accelerate puberty, attract mates, and alter menstrual cycles in humans.
- Grizzly bears can smell food from up to 18 miles away.
Last Updated: November 7, 2014