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Science.

And that is the same physics, medicine, nature, or space, time, the brain, life, the universe.

This week we delve into the science of salt.

We look at what it does in the body, why it causes problems for farmers and the new avenues

the scientists are exploring to desalinate seawater and keep us all refreshed.

Before that though, news of the contagious cancer that's followed dogs across the world

and how scientists are growing a brain in a dish to find answers to Alzheimer's

disease. Hello I'm Chris Smith and this is the Naked Scientists.

The Naked Scientists podcast is powered by UKfast.co.uk. First up, do you struggle to concentrate on tasks and do you find yourself frequently feeling unsettled?

Well if so then you could be one of the nearly 10% of the adult population who have ADHD,

attention deficit hyperactivity disorder.

Previously, we thought that this was mainly a childhood condition, but now a new study by King's

College London's Jessica Agnew Blay suggests that a large number of individuals develop

the condition as adults, despite not showing any signs of it as youngsters.

We assessed people for ADHD in young adulthood, so at age 18,

and then we looked back at 80% assessments done in childhood at ages 5, 7, 10, and 12.

And we found that actually nearly 70% of people who had ADHD at age 18

did not have ADHD at any of these childhood assessments.

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