Some of the greatest journeys into the unknown were on foot, such as Marco Poloa#39;s travels in China in the 12th century, ... A Explorers often brought back immensely valuable scientific data. By carrying out simple chemical experiments, Robert Scott hoped to learn more about the minerals in the ancient rocks of Antarctica.
|Title||:||The Big Book of Questions & Answers|
|Author||:||Ann Kramer, Theodore Rowland-Entwistle, John Farndon|
|Publisher||:||DK Publishing (Dorling Kindersley) - 1999-10-01|