Add Yahoo as a preferred source to see more of our stories on Google. Now that fall is almost here, it's time to bring out our cozy sweaters and cardigans for layering. Having a go-to cardigan is ...

A sweater knitted from a fibre that mimics polar bear fur offers as much warmth as a down jacket, despite being one-fifth as thick, according to a study published today in Science 1. The fibre — made ...