Rent.com, an eBay company (EBAY) that gives renters a free tool to search tens of thousands of rental listings nationwide, analyzed data from over 450 million searches in 2007 and 2008 to get a before-and-after look at renter behavior relative to the economic downturn (remember the recession officially began in December 2007).

FORBES: Property Managers Cut Renters Slack But At What Price?

The CAA's revised guidance says airlines should conduct their own risk assessments, look for ash damage before and after flights and report any incidents to the regulator.

ECONOMIST: The effect on business and leisure

It helps to sort problems out sooner before they get out of hand and to look after our mental health in the same way as we look after our physical health.

CNN: How mood mapping helped me beat bipolar disorder

After exposing men to 'wet heat' for 30 minutes on alternating days, researchers found a temporary decline in sperm production but did not look at sperm quality before and after the study.

BBC: Last Updated: Monday, 5 March 2007, 11:20 GMT

When I think of the pure torture this young woman went though in the last hours of her life, when I force myself to look at her picture before and after her attack, all I can think is that she looks like me.

FORBES: Connect

To get a sense of it, take a look at this slideshow of before and after pictures that give a sense of what China's toxic sky is really like.

BBC: 'Airmageddon': China smog raises modernisation doubts

But City continued to look dangerous too and they should have won a penalty before half-time when Robinho, after bamboozling Michael Beauchamp with a succession of step-overs, was hacked down by the Australian defender only for referee Alain Hamer to decide against a spot-kick.

BBC: Man City 2-0 Aalborg

The court will look at why the current system was put into place, what the landscape was like before and after the current system was adopted, the effect of the current system, the history of college football post-season, and the reasons for adopting the system as-is.

FORBES: Antitrust Suit Unlikely To Bring Playoffs To College Football