Once the stuff of tweeting birds and rolling cartoon eyes, bumps on the head are now linked to dementia. Will Smith's latest movie tells how sports authorities tried to cover it up.
There's a new Top Gear presenter in town. First tip: keep your eyes on the road ...
Zika virus and microcephaly are firmly linked, but scientists are still trying to prove that it has caused the condition.
If it sounds too good to be true ...
Brazil faces an uphill struggle with Zika – here's what's happening on the ground already.
Too much background noise has been linked to heart disease, strokes and even holding back children's learning.
Some have criticised the idea of birth control to counter small heads in babies thought to be linked to Zika virus but it's an opportunity.
Zika is quite different to Ebola – and experts would do well to wait before making recommendations this time.
They're flying off the shelves but here's what you need to know about whether fitness tracking devices work.
Commonly prescribed antidepressants increase the risk of suicidal thoughts in teenagers, so why isn't this a bigger deal in drug trials?
NHS productivity gains have been truly impressive, but are they sustainable?
Other countries have introduced 'co-payments' and the results aren't great.
The secret to longevity – take a look at your poo to find out.