Hello and also

welcome to the naked scientists with me Chris Smith and also with

Ginny Smith and you find us this week at the Cambridge Science Center where

we're recording this program in front of this wonderful audience.

This week we're taking you on a scientific journey through time,

looking at some of the key experiments and breakthroughs that have led to our present day knowledge.

With us are a team of historians and scientists who are each going to show you their favorite experiment of the past,

and explain to you why they think

it's so important. Now coming up we'll be recreating the orbits of the planets

we'll be building a battery from scratch putting the hands of the naked

scientists under the microscope to find out what's

living on them, and we'll be highlighting the ways in which your memory can play tricks on you.

But first up, material scientist Paul Coxon is going to take us back to ancient Greece to explain

the basis of one of the most famous experiments of all time and one which made the ancient

Greek mathematician, physicist, engineer, inventor and astronomer Archimedes, a household name 2,000 years later.

Hello, Paul, please welcome Paul Coxon.

Paul, what are you going to show us? I'm going to show you Archimedes' principle.

It's a very ancient experiment and it uses how materials behave in fluids to solve a historical fraud.

When you say Archimedes, this is the bloke that ran down the street in the

nude isn't it? Eureka yes he put himself in the bath and this is how he came to the discovery.

So he was a Eureka streaker. He was a Eureka Streaker.

I'm not naked.

...