The Science Behind Winter's 'Mouth Smoke': Why It Disappears in Summer

• The 'smoke' exhaled in winter is not actual smoke, but visible water vapor.
• It forms when warm, moist breath meets cold air, causing condensation into tiny water droplets.
• This phenomenon is scientifically known as condensation, similar to cloud formation.
• In summer, the smaller temperature difference prevents condensation, making the vapor invisible.
• Our bodies act as 'walking heaters,' constantly releasing warm, moist breath.

Why It Matters: Winter's visible breath is condensation of warm, moist air meeting cold, disappearing in summer due to less temperature difference.