The Friday Five covers important stories in health and science research that you may have missed - usually over the previous week but, today, we're doing a lookback on breakthrough research over the month of September. There are plenty of controversies and troubling ethical issues in science – and we get into many of them in our online magazine – but this news roundup focuses on scientific creativity and progress to give you a therapeutic dose of inspiration headed into the weekend. This Friday Five episode covers the following studies published and announced over the past month:- A new drug is shown to slow the rate of Alzheimer's disease - The need for speed if you want to reduce your risk of dementia- How to refreeze the north and south poles- Ancient wisdom about Neti pots could pay off for Covid- Two women, one man and a baby