Coptic Christians will celebrate Christmas on Monday, and many will do so outside their native Egypt. Since the revolution there, their future in the country has looked uncertain, and many are resettling in the United States.
Their population in the U.S. may have grown by nearly 30 percent, according to rough estimates. One church that has felt its membership swell with new arrivals from Egypt is in the Queens borough of New York. St. Mary and St. Antonios Coptic Orthodox Church boasts more than 1,000 families, says the Rev. Michael Sorial.
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.