So, up until 1920s, the early 1920s, this was still an unsolved question.

It's an 80 room Art Deco hotel from the 1920s.

It was in the 1920s that a big earthquake destroyed Tokyo.

In the 1920s, we thought there were major differences between people.

And now I speed up through the 1920s and the 1930s.

It was invented around the 1920s, and the inventor, Léon Theremin

In the 1920s there was an effort called 'The Anti flirt Club'.

I'm going to ask you for a moment to become 1920s forensic detectives.

You could have made it in the 1920s you wouldn't have had penicillin.

In the 1920s, astronomers studying the nebuli wanted to figure out how they were moving.

Up until the 1920s, everyone thought the universe was essentially static and unchanging in time.

In the 1920s, Kurt Gödel showed that you can never prove that the continuum hypothesis is false.

It was introduced into the United States in the 1800s, but became popularized in the 1920s and the 1930s.

Some people have tried in the 1920s to add things from the bad parts, and it didn't really work.

It was made to play Hawaiian music back in the 1920s, before they had electric guitars, trying to make a loud guitar.

Pure, austere, as bare as a vial, the minimal lines of the N 5 bottle distinguishes it from the mannered bottles of the 1920s.

My grandmother grew up in Glasgow, back in the 1920s and '30s when rickets was a real problem and cod liver oil was brought in.

And so, 25 years ago, there was a peak oil just like, in the 1920s, there was a peak coal and a hundred years before that, there was a peak wood.

But as this cartoon shows you of the first test for arsenic, these were very primitive tests, so, that our heroes really have to figure this out as they go in the 1920s.

And so that was kind of up selling in the same product line and in fact in the United States from the 1920s to the 1960s, the master of up selling was General Motors.

And he is a world expert in performing The Ursonate, which is a half an hour nonsense poem by Kurt Schwitters, written in the 1920s, which is half an hour of very highly patterned nonsense.

Now, this is a project developed in the 1920s, it's called the Kings Road House, by an architect called Schindler, and it's a pinwheel plan that pivots around the central kitchen, which is shared by a private space belonging to two families so they share a guest room that they can use, but also a kitchen space and an outdoor space.