The researchers used the fossils of a dinosaur that lived one hundred twenty-five million years ago.

VOA: special.2010.03.16

This was formed by two explosions of the Jemez volcano more than one million years ago.

VOA: special.2010.07.05

Many scientists believe that a huge object from space hit Earth about 65 million years ago.

VOA: special.2009.01.20

The small dinosaur is thought to have lived about one hundred twenty-five million years ago.

VOA: special.2009.10.13

The ancestors of these reefs were formed at least two hundred forty million years ago.

VOA: special.2010.08.10

He said the huge continent had split more than two hundred million years ago.

VOA: special.2010.01.12

These creatures lived more than sixty-five million years ago, during Earth's late Cretaceous period.

VOA: special.2010.10.05

It happened almost sixty million years ago and again thirteen million years ago.

VOA: special.2010.02.02

Scientists say the area began forming almost two thousand million years ago.

VOA: special.2009.04.15

A large meteorite hit the area four thousand million years ago.

VOA: special.2009.07.29

The Grand Teton Mountains were formed about ten million years ago.

VOA: special.2009.02.16

The limestone developed about two hundred fifty million years ago.

VOA: special.2009.12.07

The huge animals died out about sixty-five million years ago.

VOA: special.2009.09.01

T.Rex lived between sixty-five and eighty-five million years ago.

VOA: special.2009.10.13

Then,seventy-million years ago, the Earth's surface, or crust,pushed upward.

VOA: special.2010.01.04

"It's a meat-eating dinosaur. It would have lived in the Late Jurassic period about a 140,150 million years ago.

VOA: standard.2009.12.08

More than one billion eight hundred million vehicles have used the bridge since it opened more than seventy years ago.

VOA: special.2010.07.23

Four years ago, the labor agency estimated that more than twelve million people were in some form of forced labor.

VOA: special.2009.06.08

More than six hundred fifty million people have visited the Mall of America since it opened eighteen years ago.

VOA: special.2010.08.13

The events this year could cost more than the record 42 million dollars spent 4 years ago.

VOA: special.2009.01.19

The Ford Foundation started the program eight years ago with two hundred eighty million dollars.

VOA: special.2009.09.24

In March,the court fined a former Herms saleswoman $7.5 million (U.S.) for selling fake crocodile-skin bags, several years ago.

VOA: standard.2009.04.23