Pioneers • • • • •
Environment • • • • •
Eco-pioneers Concerns EPA Rachel Carson conservation
Astronomy • • • •
Energy • • • • •
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Exploration Research stations Living in space Robonauts
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Geology • • • • •
Pangaea Continental Shelf Rock cycle Water Hydroelectric power
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Frontiers can be literal and figurative borders to cross. Medical and technology frontiers are on the cutting edge of their disciplines. People who are considered pioneers cross frontiers. Frontiers may be controversial and require people to overcome hardships. Challenging theories and exploring new possibilities may lead to great discoveries. As long as we seek knowledge, new frontiers will be available to explore. People who continue to learn and share their discoveries may expand the knowledge base available to everyone.
Explorers • • • •
Contributions Discrimination Civil Rights Medicine Renaissance
Discovery of the U.S. Lewis and Clark Mission to Mars Frontiers on Earth
Alternative sources Non-renewable resources Renewable resources Food Space travel
Genetics • • • •
DNA Punnett squares Biotechnology Behavior
Geography • • • • •
Migration If the World Were a Village American West Manifest Destiny Transcontinental Railroad
Literature • • •
Political cartoons Freedom of speech Book banning