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Did you know . . . • Ancient Romans invented a machine to harvest grain? • Farmers in ancient China destroyed the pests that harmed crops by bringing in their natural predators? • The ancient Mayans restored nutrients to the soil by planting corn and beans together? People learned to farm more than twelve thousand years ago. The first farmers used simple technology. They carried water to their crops by hand. They made farm tools from wood and...
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Did you know that people first used road signs more than 2,000 years ago? Did you know that Ancient Rome had its own postal service? Did you know that Egyptian writers used flakes of limestone for scrap paper? Pens, storytelling, alphabets-communication technology is as old as human society itself. The first humans on Earth used simple communication tools. They painted on cave walls with twigs and animal fur. They carved simple pictures into bones...
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Did you know . . . • Ancient cultures measured time accurately with water clocks? • An engineer in the first century B.C. designed an odometer to calculate distance traveled? • People computed the first values of pi about four thousand years ago? Computing technology is as old as human society itself. The first humans on Earth used basic computing skills. They counted by carving tally marks in bone. They used body parts and basic tools to measure....
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Did you know . . . • The ancient Maya built magnificent pyramid-temples? • Ancient Chinese builders created central home heating systems? • One ancient Greek monument was taller than a ten-story building? Construction technology is as old as human society itself. The first humans on Earth built simple structures. They made houses from wood, clay, and animal skins. Over the centuries, ancient peoples learned more about construction. People in...
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Did you know . . . • Ancient people used bows to drill holes and start fires? • The ancient Chinese built a machine to detect earthquakes? •The ancient Romans operated a factory for milling grain? Machine technology is as old as human society itself. The first humans on Earth used basic machines. They used stone axes to butcher meat. They use levers to pry roots and rocks from the ground. Over the centuries, ancient peoples learned to make more...
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Did you know . . . • Doctors in ancient Peru performed brain surgery? • Ancient Greek doctors ran medical schools? • The ancient Indians knew how to protect people from smallpox? Medical technology is as old as human society itself. The first humans on Earth used simple healing techniques. They developed ways to set broken bones. They learned which plants were good for treating colds, headaches, and stomachaches. Over the centuries, ancient...
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Did you know . . . • People first used skis more than 8,000 years ago? • The first wheels were used in pottery-not for transportation? • Traffic jams often clogged the streets of ancient Rome? Transportation technology is as old as human society itself. The first humans on Earth used simple transportation tools. They bundled logs together to make rafts. They used long poles and flat boards to carry heavy loads. Over the centuries, ancient peoples...
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Did you know . . . • The Scythians used guerrilla warfare more than 2,500 years ago? • The Chinese general Sun-tzu wrote the first military manual in the fourth century B.C.? • Some ancient Greek warships had more than 150 oarsmen? Military technology is almost as old as human society. The first humans sometimes fought one another with sticks and spears. Over the centuries, early peoples developed more powerful-and deadlier-weapons. The ancient...
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