He says looking back thousands of years can help researchers look forward by understanding how a disease changed over time.

VOA: special.2010.06.29

We look closely at a marble statue of a "kouros", or young man that was made over two thousand five hundred years ago.

VOA: special.2010.08.04

When I look back now from this high hill of my old age, I can still see the dead lying all over the ground.

VOA: special.2010.04.08

"If you look back in history you will find that many presidents who were enormously popular in that first year became failed presidents over time.

VOA: special.2010.01.23

"If you look at nature, and I give an example in your own country, if you look to the Rocky Mountains, you find trees all over the mountains.

VOA: special.2010.07.13

"I look forward to working with members of Congress in both chambers over the coming weeks to do exactly that."

VOA: standard.2009.12.25

"I like to look at things logically,". "What are your chances of negotiating peace when now we have over 1000 civilians dead?

VOA: standard.2009.08.27

A number of people have taken over a children's climbing set. They've set up sheets and tents and what look like make shift sleeping bags.

VOA: standard.2010.01.14

Some property owners in southern Arizona, look out over Mexico from their back porches.

VOA: standard.2010.06.07

You can bend over and look at your reflection, or you can jump in thrash around, see it what it feels like, what it smells like.

VOA: standard.2010.06.19

But the look of this commercial zone has changed over the last three years.

VOA: standard.2009.12.20

Ruhli,who is a medical doctor as well as a paleo-pathologist, says looking back can help scientists look forward, by revealing how the disease evolved over time.

VOA: standard.2010.05.05

"Is it in our national interest to have images going all over the world of thousands of protesters burning in effigy some look alike of the American government?

VOA: standard.2009.04.20

"If you look at the large studies, that were published over the last several years, including a large number of patients comparing Avandia to a placebo or other drugs, there was actually no increase in that risk.

VOA: standard.2010.03.02