Upstream, downstream N. 6, 1990-91
Cultivating the Secrets of Aztec Gardens N. 6, 1992
Paricutin sparks a miraculous pilgrimage N. 3, 1991
Contract with loneliness N. 2, 1991
Symphonies of solitude from the north, Jan/Feb 1993
Spontaneous frames of movement, Sept/Oct 1993
A new age for the ancient potato, Mar/Apr 1994
Taking the pulse of population growth, Sept/Oct 1994
Singing the border news, Nov/Dec 1994
Long lost letter to the king, May/June 1995
Truth & fiction chart a miraculous journey, July/Aug 1996
Flintknapping comes of age, June 1997
Captive warriors' eloquent sketches, June 1998
Dog tails of the New World, Oct 1999
Restoring pride in Arequipa, Apr 2000
Caught in a maize of genes, June 2000
Lucid gems of ancient life, Oct 2000
Equine Allies in the New World, Aug 2001
Diary of a poll watcher in Peru, Aug 2001
Maps on the cusp of change, Apr 2002
Cineast of the human angle, Aug 2002
Great storms of the four winds, Oct 2002
En route to the real Robinson Crusoe, Dec 2002
Eclectic currents of a historic deed, Apr 2003
A scent of heaven and earth, June 2003
Quinine's feverish tales and trails, Oct 2003
Beating a passage to the Pacific, Apr 2004
The Beagle's native son, June 2005
Visual ethnographer of the new world, Oct 2005
A bug of reds & riches, Feb 2006
Silent witnesses seismic sagas, Apr 2006
The Maya war of words, Dec 2006
Guide for greenhorn travelers, Dec 2008
Tale of two cities, June 2009
Percy Fawcett and Peru's El Dorado, July 2010
The Putumayo Scandal at 100 Years, Jan 2011