And it happened again, even more spectacularly, in the last half million years when our own ancestors became cultural creatures, they came together around a hearth or a campfire, they divided labor, they began painting their bodies, they spoke their own dialects, and eventually they worshiped their own gods.

Fifty years before the battle, Baku produced half of the world's oil supply.

. ..a half a million years ago.

Manhattan that they bought 50 years ago that they have it on the books for 0.50.

We'll sweep this clear in half a year

So half a year ago,

In fact, when it did actually fill with water a year and a half ago, they were able to measure a wobble within the earth as it was spinning.

Over a half hour ago.

Although it went down slightly between 1998 and 2001, almost half of the country's women give birth to their first child before reaching the age of 20.

18 years ago,

1 year ago

Half hour ago I developed the plate.

The longest lived radioactive isotopes are 39Ar with a half life of 269 years, 42Ar with a half life of 32.9 years, and 37Ar with a half life of 35.04 days.

That's happened before.

He says a few years ago

Twenty years ago,

... andI keptthinkingofyouandme 20 years ago.

Over 2,000 years ago, he wrote

Ayear before he was drafted.

Yeah, 17 years ago.

What we all said, one year ago.

less than halfway through the Earth's life?

6. Expected loss in 2, half year 1993 41 815

This is a picture about a year ago.

Thirty years ago, we turned it on.

More than 15 years ago?

Following the earthquake, aftershocks continued several times a month for half a year.

You know, people say how half of all water well projects, a year later, are failed.

And that is how our solar system was formed, four and a half billion years ago.

It was only a halfhour ago we knew you were on your way.

Amphibians first appeared around 364 million years ago, followed by early amniotes and birds around 155 million years ago (both from reptile like lineages), mammals around 129 million years ago, homininae around 10 million years ago and modern humans around 250,000 years ago.

By 10,000 years ago, they had disappeared from New Guinea, and unfortunately, by 4,000 years ago, somebodies, we don't know who this was, introduced dingoes this is a very archaic kind of a dog  into Australia.

It began with the formation of the Earth about 4.5 billion years ago and ended, as defined by the ICS, .

When I went there 27 years later, the fish had shrunk to half of their size.

A sound came out of my mouth that I'd never heard before half groan, half scream, barely human and pure terror.

The age of the Earth is about 4.5 billion years.

We began, perhaps 5,000 years ago, with writing.

Cyrus begins in the 530s BC.

This was 300 BC.

He did this 2,200 years ago.

I lived here once. Two hundred years ago.

It occurred in the year 4004 BC.

11 years ago, this May.

Use a heavier one before you wipe out half the population.

What would you rather have a half of box of chocolate in a year or a full box of chocolate in a year and a week?