For your 2020 New Year's resolutions, think about keeping the microbes that live inside your gut healthy. Look after them and they'll look after you.
Gym memberships spike as people make their New Year's resolutions – but very few people will actually use them past February.
Cross-country skiers are 50% less likely to develop depression than the general population.
There's much more going on in the world than the Trump impeachment and Brexit. Here are five momentous global stories to track in 2020.