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 7 tips on how to eat more mindfully Parenting Newborn's gut 'microbiome' could give clues to weight later Medical How to keep your bladder happy – and prevent future incontinence Diet and nutrition Know the flax: A little seed may be what your diet needs Diet and nutrition What happens when you overdose on vitamins and minerals? Medical Can you live well with type 1 diabetes for 81 years? Just ask Don Ray Live healthier Heart health » 5 women share exactly what it feels like to have a heart attack 'I felt like I had a pill stuck in my throat.' Diet & Nutrition » 8 benefits of gherkin juice that will make you want to drink some ASAP Goodbye, salt craving.