Suppose we pick up alien radio signals from another world. Debate the pros and cons of answering such a signal. Have the class debate this issue in the format of a United Nations forum. Research some of these early voyagers to the Americas. 76-85, Sep. 1991.
All expeditions involve commitment of manpower and money.
Suppose an unconfirmed report claims that an island exists 1000 miles north of Maui. Divide the class into two groups. One group should argue in favor of the expedition, while the other should argue for housing. Zvi Dor-Ner, Columbus and the Age of Discovery , p. 119, 1991.