Professor Burgess says the first ten years of the twenty-first century are expected to register the most attacks of any ten-year period.

VOA: special.2009.06.16

During the first half of the nineteenth century, leaders of the United States could find no answer to the question of slavery.

VOA: special.2009.03.26

They were the first farmers. Since the sixteenth century, the word farm has meant agricultural land.

VOA: special.2010.01.31

The idea that dinosaurs and birds were somehow related first was reported in the nineteenth century.

VOA: special.2010.06.04

But the video effects used on stage are very much part of the twenty-first century.

VOA: special.2010.06.11

Now it is time to come back to the world of the twenty-first century.

VOA: special.2010.02.03

The expression was first used in America at the beginning of the twentieth century.

VOA: special.2009.11.15

Barbara Klein tells about " "The Twenty-first Century Family of Man."

VOA: special.2009.11.20

It was first used in France in the eighteenth century.

VOA: special.2010.04.18

Skyscrapers were first built in the late nineteenth century.

VOA: special.2010.03.31

They are the Navajo - whose ancestors walked that land at least a century, perhaps many centuries, before the first Europeans arrived.

VOA: standard.2010.03.22

His remarks come as scientists released new data showing the first decade of this century will likely turn out to be the warmest ever.

VOA: standard.2009.12.09

"In fact,I am not the first to have said it is the most difficult legislation probably in the last century because it affects literally everybody in America."

VOA: standard.2009.07.31

Historians call the killings the first genocide of the 20th century.

VOA: standard.2009.04.06