Two years ago, three years ago, about four years ago, markets did well.

And then you created Earth about 4.5 billion years ago, and then you got life about four billion years ago, and then you got hominids about 0.006 billion years ago, and then you got our version of hominids about 0.0015 billion years ago.

Humans appeared about 200,000 years ago.

This only started about 150 years ago.

Several years ago, we started thinking about it.

That hotel was established about 50 years ago.

And starting about six years ago, we asked about extremely happy people.

So, it should have happened about 480,000 years ago.

About eight years ago, Billy Graham opened for me.

And we only left Africa about 70,000 years ago.

Tom began to learn French about three years ago.

So, this is how I began, about 15 years ago.

I would wager it was probably about 200 years ago.

And a long time ago well, about 40 years ago my mom had an exchange student.

Did PSG warn Barcelona about move for Neymar three years ago?

I lived in Stratford on Avon until about five years ago.

10 years ago, it used to cost about a quarter billion.

I launched a big program unclear CSIR about nine years ago.

About three and a half years ago I made a discovery.

They built their empire in Peru about five hundred years ago.

I was here about four years ago, talking about the relationship of design and happiness.

One of the shattering events in the history of mathematics, which is not appreciated by many people, occurred about 130 years ago, 145 years ago.

YR It was about 20 years ago when I discovered free falling.

And this whole ecosystem wasn't even known about until 33 years ago.

So, this girl died when she was about three, 3.3 million years ago.

It bypassed Sweden about two to three years ago, with better child survival.

Six years ago, I started writing about women entrepreneurs during and after conflict.

I last did a TEDTalk I think about seven years ago or so.

Then from about 600 to 800 million years ago, multi celled organisms appear.

About three years ago, I read an article in the New York Times.

About 15 years ago, I went to visit a friend in Hong Kong.

My students and I got very excited about this a few years ago.

And Henry Ford, just about 100 years ago, started cranking out Model Ts.

So it was about four years ago, five years ago, I was sitting on a stage in Philadelphia, I think it was, with a bag similar to this.

And believe me, I lived the same sad life until about three years ago.

I never forget my first multicultural reading, in Harvard Square about 10 years ago.

He actually shared with me another story, which is from about 200 years ago.

But up until, literally, 15 years ago, that was all we knew about planets.

The only problem is, the first edged weapons only appeared about 200,000 years ago.

Adam Smith, 200 years ago, spoke about our desire for a life without shame.

If you go back in time about 75,000 to 100,000 years ago, let's look at human evolution, it turns out that something very important happened around 75,000 years ago.

Do you know we all have about 50 chemicals in our bodies we didn't have about 50 years ago?

In short, they are acquiring the status that they had a million years ago, 10,000 years ago, 100,000 years ago.

The Earth was formed 4.6 billion years ago and was probably too hot for about the first half billion years.

This is a photograph taken about 100 years ago of my grandfather and great grandfather.