Call it the political revenge of the nerds. For nearly eight years, many mainstream scientists have been frustrated with the Bush administration. They've claimed that science has been censored, ignored and politicized on issues from global warming to stem cells to evolution. Even the presidential science adviser was booted from the White House, forced to set up office down the street. Both presidential candidates - Sen. John McCain and Sen. Barack Obama - offer policies farther from the president than they are from each other. They advocate mandatory caps on the main global warming gas and favor federal funding for...