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Tells the story of the first explorers to travel around the world and describes how and why these two epic journeys came to be made.

Abstract:The current study was designed to determine if differences in opinion existed among student-athletes (SAs) at five NCAA Division III (DIII) institutions with (n 250), and five institutions without (n = 235) a drug-testing program, regarding the deterrent value of institutional drug testing. The opinions of DIll Directors of Athletics (ADs; n = 10) were also examined. Differences were examined using the Student-Athlete Drug-Testing Questionnaire and the Athletic Director Drug-Testing Questionnaire, and analyzed using chi-square and Mann-Whitney U tests. SAs and ADs were surveyed about: (a) institutional testing, (b) current NCAA DIII Championship testing, and (c) hypothetical NCAA DIII year-round testing. ADs responded similarly to questions about the three testing programs. SAs responded similarly to questions about the deterrent value (personally) of the three testing programs, while drug-testing SAs responded significantly higher than non drug-testing SAs when asked about their peers. Practical support was found for the use of drug testing as a deterrent to steroid use. As ADs and the NCAA consider increased drug testing in DIII, more research is needed to evaluate the strength of testing as a deterrent.

Follows expeditions across the Sahara and Kalahari deserts, along the valleys of the Congo, Niger, Nile, and Zambezi rivers, through rainforests, over mountains and on vast lakes.

Describes the physical structure of the earth and explains the origins of natural phenomena such as mountains, volcanoes, earthquakes, soil formation and caves. Also details human activity underground, including building tunnels and drains, and mining. Includes glossary. Suggested level: intermediate, junior secondary.