NPR News

It's a big night in Iowa: The Republican presidential candidates are holding their final big debate prior to the Iowa caucuses, which take place on Jan. 3. Melissa Block talks with Iowa Republican Gov. Terry Branstad about various candidates' strengths and weaknesses. In short, he says there's a lot of excitement, and he's reserving judgment on who the winner will be.

There's a world of activity between when online shoppers click the "place order" button and when a holiday package is delivered to their doorsteps. The National Retail Federation estimates that 38 percent of holiday purchases will be made online this year, which is keeping fulfillment centers large and small very busy.

Target.com runs five fulfillment centers. One of them, in Tucson, Ariz., stretches the length of 16 football fields.

A group of chemists have presented what they say is self-cleaning fabric that could one day lead to jeans, shirts and other clothing that dissolves stains and kills bacteria when exposed to sunlight.

The scientists announced their findings in the journal ACS Applied Materials & Interfaces, which is peer-reviewed and published by the American Chemical Society.

If you're unemployed, it can be painfully clear when you don't have the right skills to land a good job.

With unemployment at 8.6 percent, upwards of 13 million Americans are without a job and looking for work. A recent NPR/Kaiser Family Foundation poll surveyed thousands of unemployed and underemployed people, asking whether they thought they had the skills required to find a job.