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Vice President Biden and his Republican opponent, Rep. Paul Ryan of Wisconsin, had a lively debate at Centre College in Danville, Ky., this evening — one marked by Biden's aggressive challenges to many of the Republican vice presidential nominee's claims and Ryan's oft-repeated message that the Obama-Biden administration's policies aren't working.

The discussion was steered by ABC News' Martha Raddatz. It's the only vice presidential debate of the campaign.

Another day, another editorial board, another controversial remark for Republican presidential nominee Mitt Romney. On Wednesday, it was abortion. On Thursday, health care.

Just as they did before, during and after last week's presidential debate, the fact checkers will be up and running for tonight's vice presidential debate:

A few terms and figures became flash points for later discussion in the first presidential debate between President Obama and Republican challenger Mitt Romney. From Simpson-Bowles (which was mentioned at least eight times) to the much-discussed $716 billion cut in Medicare, the presidential debate and the wider campaign have featured a growing list of devilish details that could use a good footnote. Here's a closer look at a few of these disputed terms that are likely to come up in the vice-presidential debate.

If you're looking for something else to do while watching or listening to tonight's 90-minute vice presidential debate, there's always debate bingo.

The names Columbine and Virginia Tech have both become tragic shorthand for school shootings in America. In the wake of those shootings, schools have developed a fairly typical lockdown procedure when there's a threat: sound the alarm, call police, lock doors and stay put.

The standard school-lockdown plan is intended to minimize chaos so police arriving on the scene don't shoot the wrong people. Students practice following directions, getting into classrooms and essentially, waiting.

Many Americans today feel like they've lost or are losing their shot at a college education because paying for it often seems out of reach. So how big of an issue is this in the presidential campaign?

Here's what President Obama has done to help families pay for college: He negotiated a deal with Congress this summer that kept the interest rate on government-backed Stafford loans from doubling for 7.5 million students.

Tell us you can resist clicking on this headline from Florida's Sun Sentinel:

"Huge Eyeball From Unknown Creature Washes Ashore On Florida Beach."

It's big, it's blue and the newspaper says "among the possibilities being discussed are a giant squid, some other large fish or a whale or other large marine mammal."

The Florida Fish and Wildlife Conservation Commission has sent the eye off for study.

There are two ways to look at results of a recent investigation of nursing homes by the U.S. Department of Health and Human Services. Both are pretty disturbing.

The words of the English poet William Blake still resonate 185 years after his death. Blake, who was also a painter and printmaker, wrote the famous lines, "Tyger! Tyger! burning bright / In the forests of the night."

The giant panda cub born at Washington's National Zoo did, as first suspected, die on Sept. 23 because of "lung and liver damage" stemming from problems with her development, zoo officials say.

Kentucky may be the site for tonight's debate between the vice presidential candidates, but the monster swing state of Ohio remains the focus of White House dreams for President Obama and Mitt Romney.

Both the incumbent and his challenger have been in and out of the state with increasing frequency; GOP vice presidential candidate Paul Ryan plans a trip to the Buckeye State on Friday, after his tangle with Vice President Joe Biden.

Scientists have discovered a world much fancier than our homely, little Earth.

New research that will published in the journal Astrophysical Journal Letters details a planet that is eight times heavier than Earth and with twice its radius. But instead of being covered in water and granite, it is encrusted in graphite and diamond.

A masked gunman killed a Yemeni man when he was on his way to work as a security official at the U.S. Embassy in Sanaa, the AP and Reuters are reporting.

The Associated Press reports that Yemeni officials said the drive-by shooting was reminiscient of other attacks undertaken by the al-Qaida offshoot in Yemen.

The AP adds:

When a stranger can gain access to someone's entire genetic code by picking up a used coffee cup, it presents a whole new thicket of concerns about privacy and security.

Actually, we're already there, though we're still in the early stages of what's shaping up, after all the years of hype, as a genuine revolution. Just take a look at Rob Stein's recent series on the $1,000 genome to see how far we've come and where we're headed.

The New York City council Wednesday held a hearing about blocking the controversial "stop and frisk" policy. That allows police to stop, search, and question people suspected of carrying weapons or drugs. It's also the subject of a New York Times short film. Host Michel Martin speaks with a producer and a young man featured in the film.

Tensions are heating up between Syria and Turkey, as rebels and regime troops continue to battle it out. Host Michel Martin discusses whether the conflict can spill over with Abderrahim Foukara of Al Jazeera International and Radwan Ziadeh of the Syrian National Council, a coalition of exiles opposing Syrian President Bashar al-Assad.

It may be the undercard to the main event, but partisans on both sides are talking some trash ahead of the vice presidential debate tonight in Danville, Ky.

The pressure is particularly intense on Vice President Joe Biden, following his boss' lackluster performance in last week's presidential debate, which moved GOP nominee Mitt Romney into a national polling lead.

The news coming out of Pakistan today in the case of Malala is not good: The 15-year-old girl shot by the Taliban has been airlifted to the "country's top military hospital for specialist treatment," Pakistan's Dawn reports.

The rift between Syria and Turkey deepened, after Turkish warplanes forced a Moscow-to-Damascus bound passenger airplane to land on Wednesday.

Not only that but it also opened fresh conflict with Russia. The New York Times reports that today Moscow demanded answers for it called "air piracy" and Turkey said it had found illegal materials on board.

The Times reports: