We can learn languages while we sleep, according to new study

Why sleeping helps you heal when you're sick

Bikes for boomers are lower and slower

Why you really need to floss your teeth

Brain-training benefits may be all in your head

There's a possible link between this vaccine and a decline in Type 1 diabetes

It wouldn't be winter in Finland without a dip in a frozen lake

We need a better word than 'walkable'

You have 17 different facial expressions to show happiness (and that's reason to smile)

What is a metabolic equivalent?

Why the third Monday in January could be the most depressing day of the year

10 unexpected ways to improve heart health