Sometimes they can even answer questions
A New Zealand firm is trying to make an old idea work commercially
That has not stopped clinics prescribing them enthusiastically
Clean and quiet
Pushing the limits of a technique that has revolutionised palaeontology
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The AAAS heard how cities with lower carbon emissions could be built
It is a new approach to precision medicine
But still have a long way to go
Understanding how will help treatments
Getting a leg up
But the difference only emerges when the children are teenagers