A biography of 16th century Spanish explorer and conquistador Francisco Pizarro, who traveled with Vasco Nunez de Balboa and helped to discover the Pacific Ocean. Pizarro also conquered Peru and founded the city of Lima there.

Ocean explorer Robert Ballard takes us on a mindbending trip to hidden worlds underwater, where he and other researchers are finding unexpected life, resources, and even new mountains. He makes a case for serious exploration and mapping....