The first key to thinking about 3-D printers is this: Do not think printer. Think magic box that creates any object you can imagine.
In the box, razor-thin layers of powdered material (acrylic, nylon, silver, whatever) pile one on top of the other, and then, voila — you've got a shoe, or a cup, or a ring, or an iPhone case.
It's miraculous to see. Press a button, make anything you want. But just how important is 3-D printing? Unlike earlier big-deal technologies (like, say, the tractor) 3-D printing won't really replace what came before.
South Korean men play games at a downtown park in Seoul on Nov. 1. Recent data suggest that South Korea is now the fastest-aging country on Earth.
Credit Anthony Kuhn / NPR
The Gangseo District Center for Dementia is one of Seoul's 25 community-level centers helping families care for dementia patients. The rapid increase in dementia is just one consequence of South Korea's rapidly aging population.
Credit Anthony Kuhn / NPR
High school student Kim Dong-hyun undergoes a simulated experience as an incapacitated elderly person who is hoisted from his bed into a chair by means of a winch and sling. Training at the Seongnam Senior Complex outside Seoul is intended to help young people understand what the elderly are experiencing.
At a clean and sunny community center in Seoul, the South Korean capital, senior citizens make clay models of their own faces in an arts class. Some of the faces are vivid and lifelike. Others are expressionless and indistinct. The project is intended to help the seniors remember what they look like.
This is the Gangseo District Center for Dementia. Since 2006, Seoul has opened a dementia center in each of the city's 25 urban districts.
Update at 1:30 p.m. ET: The counting is done and as expected, President Obama and Vice President Biden collected all 332 Electoral College votes they earned on Election Day. Their Republican opponents, Mitt Romney and running mate Rep. Paul Ryan of Wisconsin, received 206 votes each.
Since it takes 270 Electoral College votes to be elected, the president and vice president have indeed been returned to office.
Burry Stander, one of the world's elite mountain bikers, was killed Thursday as he rode his bike in his native South Africa. Stander, 25, a two-time Olympian who placed fifth in his event at the London 2012 Olympics, was reportedly struck by a taxi van as he trained near his home in Shelley Beach, on South Africa's southeastern coast.
The close proximity of the accident to his childhood home apparently allowed Stander's family members, reportedly including his wife, mother and father, to arrive at the scene quickly.
Following years of moving jobs overseas, some companies are deciding there are benefits to manufacturing products here at home. Guest host Celeste Headlee discusses the latest jobs numbers and the new trend called "insourcing." Headlee talks with Wall Street Journal reporter Sudeep Reddy and journalist Charles Fishman.