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

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

But he is still not certain that this is the time to look back at what, by any standard in popular music, has been a remarkable career.

WSJ: Carry On, Stephen Stills | By Jim Fusilli

At the same time in Edinburgh, Scotland look to bounce back from their rather predictable defeat by the All Blacks last weekend when they take on world champions South Africa at Murrayfield.

BBC: Autumn Tests - as they happened

"My expectation is that by the time that my term is over, you guys are going to look back and you're going to say, 'This was a responsive administration on health care, on housing, on education, that actually made sure the money flowed and that things got done the way they were supposed to get done, " he said.

CNN: On New Orleans visit, Obama tells critics, 'I'm just getting started'