This is also mentioned in Metro 2033 by Dmitry Glukhovsky - http://en.wikipedia.org/wiki/Metro_2033_(book) http://en.wikipedia.org/wiki/Metro_2033_(book) Amazin

This is also mentioned in Metro 2033 by Dmitry Glukhovsky - http://en.wikipedia.org/wiki/Metro_2033_(book) http://en.wikipedia.org/wiki/Metro_2033_(book) Amazing science fiction book.