Meet the Swimming Reptiles
|
|
2.3 |
|
|
Meet the Small Dinosaurs
|
|
2.4 |
|
|
Meet the Flying Reptiles
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|
2.3 |
|
|
Meet the Plant-Eating Dinosaurs
|
|
2.6 |
|
|
Meet the Meat-Eating Dinosaurs
|
|
2.4 |
|
|
Meet the Giant Dinosaurs
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|
2.4 |
|
|
Vaccines
|
|
2.9 |
|
|
Germ Theory
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|
2.9 |
|
|
X-Rays
|
|
2.8 |
|
|
Solar Panels
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|
2.9 |
|
|
Light Bulbs
|
|
2.8 |
|
|
Smart Homes
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|
2.9 |
|
|
Toilets
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|
2.9 |
|
|
Refrigerators
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|
2.9 |
|
|
TVs and Remote Controls
|
|
2.9 |
|
|
Antibiotics
|
|
2.9 |
|
|
Louisiana Purchase
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|
2.9 |
|
|
Great White Sharks
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|
2.8 |
|
|
Immigration through Ellis Island
|
|
2.9 |
|
|
Texas Revolution
|
|
2.9 |
|
|
Hammerhead Sharks
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|
2.9 |
|
|
Can't Rest in Peace
|
|
2.6 |
|
|
Angel Sharks
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|
2.7 |
|
|
Blue Sharks
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|
2.6 |
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|
