The Hello and welcome to episode 3 of our series Destination Mars.

So far we've looked at what it takes to be an astronaut and how we can get to the red planet.

But this week we've finally made it there, so we're exploring how to build a home from home on Mars.

Plus, news of how plants have bees hooked on caffeine, new insights into how hallucinations

happen, and a brain scan to find the cause of epilepsy.

I'm Georgia Mill and I'm Katani and this is the naked scientists.

Up first, epilepsy is a brain condition that causes patients to fit and lose consciousness.

In the process they can injure themselves and the condition can seriously affect a person's quality of life.

Now, scientists have developed a brain scanning

technique that can find the source of a patient's fits, meaning they can

potentially be cured surgically. It works by homing in on hot spots in the brain that contain increased amounts of the chemical

glutimate which signals excited nerve cells as neurologist and co-inventor of the technique

Kate Davis explains to Chris Smith.

Epelops use a very common disease affecting 65 million people worldwide and one-third of those patients actually don't respond to medications and at times we actually will consider surgery as an option for a potential cure.

So we sought to use a new method to figure out where the seizures are coming from and to help us direct

whether or not we can do

surgeries or other therapies to help these patients. And in people with epilepsy what

is actually happening in their brain in the first place to cause the condition.

So it's thought that there's a mismatch between how much excitation there is and how much inhibition

there is when patients have a seizure.

The thing we measured in this study measures

glutamate, which is a neurotransmitter in the brain that is the most common

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