We heard a lot about how the candidates feel about foreign policy in Monday night's debate. In fact, over three debates, we have seen the candidates debate any number of issues. But not climate change.
For whatever reason, President Obama and Mitt Romney never got around to tackling climate change in the debate forum. Neither, for that matter, did Vice President Joe Biden and GOP vice-presidential hopeful Paul Ryan.
This is the first debate cycle since 1984 that has not mentioned phrases such as "climate change," "global warming" or "environmental crisis." In 1988, the issue arose in the vice-presidential debate between Democratic candidate Lloyd Bentsen and Republican candidate Dan Quayle; both mentioned "the greenhouse effect."
Brad Johnson, campaign manager for the group Climate Silence, issued a statement circulating in the media highlighting this fact. The candidates "have failed to debate the greatest challenge of our time. Climate change threatens us all: The candidates' silence threatens to seal our fate," Johnson said in a statement, as quoted by Scientific American.
"Expedition 33/34 crew members, Soyuz Commander Oleg Novitskiy, bottom, Flight Engineer Kevin Ford of NASA, and Flight Engineer Evgeny Tarelkin of ROSCOSMOS, top, wave farewell before boarding their Soyuz rocket just a few hours before their launch to the International Space Station on Tuesday, Oct. 23, 2012, in Baikonur, Kazakhstan. Launch of a Soyuz rocket later in the afternoon will send Ford, Novitskiy and Tarelkin on a five-month mission aboard the International Space Station."Source: NASA
Editor's note: This post is part of the Overheard on CNN.com series, a regular feature that examines interesting comments and thought-provoking conversations posted by the community.
Last week, NASA scientists announced that the Mars rover Curiosity had found something unexpected: small bright objects. These one-millimeter flecks didn't appear to originate from the rover, but rather from Mars itself. They could be part of the soil forming process, or they could be minerals cut in particular ways that make them look shiny in sunlight.
More than 550 people commented on this story. Most people had fun guessing what the shiny objects might be.
Earthquake experts around the world say they are appalled by an Italian court's decision to convict six scientists on manslaughter charges for failing to predict the deadly quake that devastated the city of L'Aquila. They warned the ruling could severely harm future scientific research.
The court in L'Aquila sentenced the scientists and a government official Monday to six years in prison, ruling that they didn't accurately communicate the risk of the earthquake in 2009 that killed more than 300 people.
The trial centered on a meeting a week before the 6.3-magnitude quake struck. At the meeting, the experts determined that it was "unlikely" but not impossible that a major quake would take place, despite concern among the city's residents over recent seismic activity.