Sens. Barack Obama and John McCain are gearing up for a general election battle -- barring a surprise surge by Sen. Hillary Clinton -- in which they will offer very different visions for health care reform.

The Presidency really takes its toll; just look at how George Bush has aged. To see how the current candidates would fare after a term in the Oval Office, we put them through the Pop Photo Time Machine. See our Photoshopped before and afters of Hillary Clinton, John McCain, and Barack Obama.

The gurus at PopPhoto have digitally altered photos of John McCain, Barack Obama, and Hillary Clinton to show how they might look after four years of holding the most stressful job in the country.

Americans urge the presidential candidates to debate science

See where the candidates - and you - stand on each issue.

Info linked to multiple sources

Somehow or another a growing number of readers and commentators here at Open Left have gotten it into their heads that I'm in the game of supporting/endorsing candidates. Let me assure you unequivocally that this is not true.

The latest roundup of the presidential candidates’ stands (and non-stands) on science-related issues such as stem cells, climate change and energy policy illustrates why a debate focusing on those issues is so needed … and so unlikely to happen. Some hopefuls have been ducking so much you’d think they were out hunting with Dick Cheney. Nevertheless, analysts have come up with bits of data that run counter to the conventional wisdom.

See at a glance where the presidential contenders stand on climate and energy issues

Forget boxers or briefs. You want to know about candidates' stances on energy and the environment, right? Well, you've come to the right place.