填空题 Why should mankind explore space? Perhaps the best reason for exploring space is our built-in {{U}} {{U}} 1 {{/U}} {{/U}}predisposition to expand into all possible parts of space. Culturally nearly every successful civilization has been willing to {{U}} {{U}} 2 {{/U}} {{/U}}. In exploring, {{U}} {{U}} 3 {{/U}} {{/U}}of surrounding areas may be learned and prepared for.
Exploration also allows {{U}} {{U}} 4 {{/U}} {{/U}}to be located. These resources translate into {{U}} {{U}} 5 {{/U}} {{/U}}and success at survival. Resources may be more than {{U}} {{U}} 6 {{/U}} {{/U}}assets. Knowledge or {{U}} {{U}} 7 {{/U}} {{/U}}acquired in exploring or preparing to explore always filter from the developers to the general {{U}} {{U}} 8 {{/U}} {{/U}}. Techniques may be {{U}} {{U}} 9 {{/U}} {{/U}}or {{U}} {{U}} 10 {{/U}} {{/U}}, allowing the people in a society to better {{U}} {{U}} 11 {{/U}} {{/U}}those within or outside the culture. Better understanding may lead to better use of resources or a lessening of outright {{U}} {{U}} 12 {{/U}} {{/U}}for the resources.
The chance of a large {{U}} {{U}} 13 {{/U}} {{/U}}or comet hitting Earth, though small, will {{U}} {{U}} 14 {{/U}} {{/U}}. Without the ability to reach out across space, the chance to {{U}} {{U}} 15 {{/U}} {{/U}}ourselves might not exist. Our genetic {{U}} {{U}} 16 {{/U}} {{/U}}will allow humans to move into unoccupied parts of space and {{U}} {{U}} 17 {{/U}} {{/U}}. If one group is eliminated, the {{U}} {{U}} 18 {{/U}} {{/U}}as a whole survives. The more a culture expands, the less chance of it becoming {{U}} {{U}} 19 {{/U}} {{/U}}. Space allows us to {{U}} {{U}} 20 {{/U}} {{/U}}.