Home > Newsletters > Daily: Love or hate Earth Hour? > Daily Dose: This is why your vanilla or cinnamon flavoured e-cigarette is toxic > Health-in-Motion Updated 12 February 2018 To us, our sense of hearing appears to be constant. To us, our sense of hearing appears to be constant – it’s always “on” and the same in both ears. Not so, say collaborating scientists from Italy and Australia whose research indicates that the strength of our hearing goes through highs and lows at rate of about six per second, even though we are not consciously aware of the process. What’s more, these oscillations vary between the right and left ear – first the one hits its highest sensitivity and then the other in a never-ending cycle. 0 More: Daily Dose: This is why your vanilla or cinnamon flavoured e-cigarette is toxicHealth-in-Motion advertisement Other news Diet and nutrition How many kilojoules are actually in a potato, anyways? Diet and nutrition What exactly is folic acid, and should you be taking it? Medical 10 famous people in history who smoked weed News Ageing skin and all that comes along with it Medical QUIZ: How much do you know about constipation? Medical Oral care: The limitations of just brushing alone From our sponsors Dementia and Incontinence: what you need to know Tell-tale signs you need a mattress upgrade Keen to win a R2 000 voucher? Good health begins in your gastrointestinal tract Live healthier Looking younger » Can maple leaves help you look younger? New research has found that maple leaf extract can help you look years younger. Killer foods » Wild mushrooms a 'silent killer' Health practitioners are warning people to stay away from wild mushrooms.