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Mitt Romney continued his post-debate campaign swing Wednesday.

Rep. Paul Ryan is campaigning across the battleground states as Mitt Romney's running mate, in hopes of being the next vice president. But he's also running for re-election in Wisconsin's 1st Congressional District.

Growing algae as a source of fuel could consume vast amounts of water and fertilizer, according to a study by the National Academy of Sciences. There's also a risk that the energy required to produce these fuels would make them impractical. These daunting technical problems need to be overcome if the nation wants to turn to algae fuels as a substitute for gasoline.

Frank Tanabe, who was in a California internment camp when he volunteered to serve in the U.S. Army, was 93. A photo of him voting from his deathbed went viral this month.

A survey finds that the majority of advanced stage lung and colon cancer patients believe chemotherapy might cure them, when it can actually only buy them a few months. Oncologists are worried about how this impacts end-of-life decision making.

In races from U.S. Senate to state attorney general, candidates know their fortunes are largely tied to the respective fates of Mitt Romney and President Obama. Many acknowledge that a strong partisan wave threatens to wipe them away, so they're pushing to run ahead of their ticket.

Insurgents continue to adapt and experiment with new tactics and approaches. The roadside bombs come in all shapes and sizes, and have grown more sophisticated and more lethal.

Chinese dissident and artist Ai Weiwei is pushing authorities' buttons again, this time with a spoof that was quickly blocked from Chinese websites. He's mocking government censorship.

A message has appeared on the website of Syria's SANA news agency saying that the country's armed forces will halt military operations for four days, starting Friday. But the regime has some conditions and rebels doubt the military will honor its pledge.

Both candidates have been on their talking points about high gas prices. But Bloomberg Businessweek contributor Roben Farzad says there's only so much elected officials can do to control prices at the pump. He speaks with host Michel Martin as a part of NPR's "Solve This" series, looking at issues driving the election.