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from article Model theory
Conceptual model of a system.
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from article Model theory
Model of a regional population system.
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from article Animal testing
Mice are the most commonly used vertebrate species in animal testing and research. (Credit: Dolores Bonaparte)
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from article Animal testing
The use of animals in biomedical research remains essential, but the handling of these sentient beings must be done humanely to minimize and prevent animal harm. (Credit: U.S. Department of Agriculture)
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from article Science
Italian physicist and astronomer Galileo Galilei (1564–1643) founded the modern scientific method of deducing laws to explain the results of observation and experiment. (Credit: Getty Images)
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from article Experiment
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from article Philosophy of science
Pulpit Rock Park in Colorado Springs, Colorado, photographed with camera equipment sensitive to infrared wavelengths of light outside of the visible portion of the electromagnetic spectrum that humans can perceive. The "invisible" light is rendered…
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from article Philosophy of science
Bust of the Greek polymath Aristotle. (Credit: Photos.com/Getty Images)
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from article Scientific methods
Fig. 1. A scientific investigator examining laboratory samples. (Credit: nandyphotos/Getty Images)
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from article Scientific methods
Portrait of scientist Francis Bacon at the age of 66. Bacon advanced challenging views of the scientific method. (Courtesy of Rijksmuseum, Amsterdam)
