The Hello, welcome to the naked scientists with me, Chris Smith and also with Cat Arnie.

This week why astronomers blew the top off a Chilean mountain, why tanning beds may have

an addictive quality and why Tesla have given away their electric car patents for free.

Plus, England may have exited the World Cup, but we're exploring the science behind

one of the world's biggest sporting events this week, including how chanting affects

fans, evidence for discrimination by referees on the pitch, and evidence

that domestic violence is linked to footy results.

The Naked Scientists Podcast is powered by UKfast.co.uk.

This week 3,000 meters up a Chilean mountain,

scientists press the button to blow up half a million tons of

rock.

The mountains called Chiro Amazonas, and the reason it was being blown up was to create the site

for what will become the world's most powerful optical telescope.

With typical scientific understatement, it's known as the European Extremely Large Telescope,

or EELT.

Jerry Gilmore from the Institute of Astronomy is one of the EELT

initiative and he's with us. Hello Jerry. Good evening. So first of all what is

this telescope? It's designed to be the biggest optical and near infrared

telescope yet built. It will be maybe twice as big as it's near as

competitor, four of times bigger than the biggest that we have today and will allow us to

go maybe a hundred times deeper and fainter into the universe.

When we say optical telescope what does that mean?

...