The New Scientist is experimenting by publishing an article under 'copyleft' rather than copyright.

Copyleft, or General Public License, as used in this case, is the print equivalent of open source. For New Scientist what this means is:

. . .you can copy it, redistribute it, reprint it in whole or in part, and generally play around with it as long as you, too, release your version under a copyleft and abide by the other terms and conditions in the licence. We also ask that you inform us of any use you make of the article, by e-mailing copyleft@newscientist.com.

One purpose of open source is to continue to explore the ground between complete free use, including the ability to change a document and claim authorship and pay-per-use and other restricitive license arrangements. Copyleft does not mean giving up copyright to an article. It does allow for the lifting of some restrictions for how the article is used.