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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 Physical science
An astronaut conducts a physical science experiment aboard the International Space Station involving buoyancy-driven convection and sedimentation, which as force-dependent phenomena occur differently in a microgravity environment. (Credit: NASA)
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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 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 The development of the lithium-ion battery has won the chemistry Nobel Prize
Three scientists, John B. Goodenough, M. Stanley Whittingham and Akira Yoshino (from left), have won the Nobel Prize in chemistry for their work on lithium-ion batteries. (Credit: From left: Cockrell School of Engineering/Univ. of Texas at Austin;…
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from article Euthanasia
Euthanasia is an act by a person, typically a physician, actively and intentionally to end another person's life by some medical means at that person's explicit request. (Credit: Michael Jung/Shutterstock)
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from article Scientific methods
Fig. 1. A scientific investigator examining laboratory samples. (Credit: nandyphotos/Getty Images)
