This week, the classic research methods of the historian, ancient texts, museum artifacts, and carefully controlled experiments.

There really hasn't been anything like our experiment before.

And the sunken cities of Egypt show off their treasures in a new exhibition.

They had never been discovered before. I was convinced they were under the sea.

Plus making antibiotics like you'd build a house out of Lego.

This is the nature podcast for May the 19th, 2016.

I'm Kerry Smith.

And I'm Noah Baker. This week a new exhibition opens in London, chronicling the work of an underwater archaeologist who found not one but two lost cities. Here's Kerry.

One day in 2001, in a boat a few kilometres off the coast of Egypt,

archaeologist Frank Goddio strapped on his diving mask and plunged into the Mediterranean.

He and his team had been mapping the area under the sediment,

looking for the remains of three fabled cities.

It took much less time than he had planned to find something.

I was excavating the very first day of the mission,

and under 1.8 metre of sediment, I came across a big block of red granite.

But the visibility was extremely poor underwater,

and when I started to clean that block, I could not realize what it was.

I could see a big foot.

But I said, no, this is too big to be a foot of a statue.

It must be something else.

Well, then after a few meters away, we found the face, and I understood that

I was in presence of a gross statue of a god. Frank Godio had found a statue of the Egyptian god of

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