I found one of the New Scientist articles available in a non-subscriber section.
http://www.newscientist.com/news/news.jsp?id=ns99993546
http://www.newscientist.com/news/news.jsp?id=ns99991674
http://www.newscientist.com/news/news.jsp?id=ns99993546
http://www.newscientist.com/news/news.jsp?id=ns99991674