If you look at the origins of this, the classic history sort of takes it all back to the ENIAC here.

5220 Prior surveillance

And this chart goes back to 1500.

Through my work, I've been trying to find ways to harness and unveil this.

We just want to go back and find out more.

It all started back in 2001.

It goes all the way back to Aristotle.

All these things, they come back to plants.

Their history actually goes back to about the time of Christ.

They go back about two and a half million years.

Most Americans are descended from immigrants.

According to Iraq, Jordan had already made plans to address depletion and deterioration of its groundwater resources before the conflict.

They want to go back to its roots and make conscious hip hop popular again.

The old church on the hill dates back to the twelfth century.

The first tunnels date back to 60 B.C.

These are animals whose lineage dates back about 100 million years.

It goes back to a time when I was very often staying in hotels.

And you can do the same with your genes and track them back in time.

Most Americans are descended from immigrants.

We've been on a journey, a return journey, of 13.7 billion years.

It's really been a long time since we've known about fusion.

Presently, only the data on the incidence of injuries are available, and can be followed for the last five years.

You can decode the genome, you can look back, you can link us all together by a mitochondrial DNA, but we can't get further than the last ancestor, the last visible cell that we could sequence or think back in history.

So what this figure shows is that spiders date back to almost 380 million years.

Women Without Men returns to history, but another part of our Iranian history.

For the answer to this, we turn to our spiritual path.

Well the reason, I think, essentially is, again, back to the civilization state.

The Y chromosome, the piece of DNA that makes men men, traces a purely paternal line of descent.

The criminal law is applied retroactively only when this results in benefit for the defendant.

And I think once we ask that question we have to go back, actually, to life. Because obviously, if we keep extending the origins of technology far back, I think we come back to life at some point.

Farther back is there one shared with chimpanzees.

OK, here's another mine that's up on top of the property, and it dates back to 1870.

Let's begin by winding the timeline back 13.7 billion years, to the beginning of time.

Back in 1968, you can see that the mountain range of Brokeback Mountain was covered in 151 inches of snow pack.

b The Committee considers that the entry into force goes back to the date when the State became independent.

f The Committee considers that the entry into force goes back to the date when the State became independent.

The two human DNA sequences go back to a common ancestor quite recently.

It dates back at least 200 years, to Galvani's famous experiments in the late 18th century and beyond.

Back in 1950, you would have had to work for eight seconds on the average wage to acquire that much light.

And further back, 800,000 years ago is there a common origin with present day humans.

The decorative use of wire in southern Africa dates back hundreds of years.

All of this was going through my head towards the end of 2008, when, of course, the great financial crash happened.

It actually goes way back, and what I want to suggest is it goes a long way back.

Because if we go far enough back, we share a common ancestry with every living thing on Earth.

I rarely find an audience where people can go back very far without that experience.