Methane is the source of the gas we burn in stoves. You can also use it to make plastics, antifreeze or fertilizer. It comes out of underground deposits, but it also seeps up from swamps, landfills, even the stomachs of cows.
And while methane is valuable, a lot of it gets up into the atmosphere, where it becomes a very damaging greenhouse gas.
Seniors aged 65 and over represent one of the fastest growing age groups to use social media. But what drives them to do so, and what kinds of technology can help their experience? Audie Cornish speaks with Dr. Laura Carstensen, who heads the Stanford Center on Longevity, for more on the culture of seniors and technology.
Divided & United is the name of a new, two-disc collection of songs from the Civil War. The selections tell tales of fear, loneliness, exhaustion and triumph. All recordings featured on the album, which was produced by Randall Poster, are new takes on old songs; historian Sean Wilentz wrote the liner notes for the record.
The collection features lesser-known songs of the Civil War, some by a songwriter named Henry Clay Work. According to Wilentz, Work was a key member of a group of composers that wrote the history of the era through song.