Archimedes was a Greek mathematician, physicist and inventor. He lived in Syracuse in around 200 BC.
I know, I'll find out how much water is displaced by lumps of gold and silver
The King had ordered a blacksmith to make him a gold wreath only out of pure gold. The King was pleased until rumors had started to appear saying that the goldsmith had cheated the King. So, he ordered Archimedes to find out the truth.
The king has been cheated!
One day Archimedes walked to the public baths and as he got in he realised that as he began to lower himself into the water