Ancient Mexico / Robert H. Cobean, Alba Guadalupe Mastache -- The Olmec / David C. Grove -- The imprint of the Olmecs: cultural expansion in Mesoamerica / Enrique Vela -- Olmec art / Beatriz de la Fuente -- El Manati´, Veracruz / Ponciano Ortiz, Carmen Rodri´guez -- La Venta: a great Olmec city / Rebecca B. Gonza´lez Lauck -- The colossal heads / Ann Cyphers -- San Lorenzo, Veracruz / Ann Cyphers -- The Precolumbian image of hurricanes / Arturo Oliveros -- Teopantecuanitla´n / Guadalupe Marti´nez Donjua´n. Carlos Pellicer and the La Venta Park-Museum / Mo´nica del Villar K. -- Cacao: 1500 years in Tabasco / Marti´n Gonza´lez de la Vara -- The natural environment of the Olmec world / photos, Patricio Robles Gil ; informacio´n, Eugenia Pallares -- The rubber tree / Fernando Sa´nchez-Marti´nez -- Saint James and the mare / Luis Fernando Granados Salinas -- The spotted robe: stories of the jaguar.