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Opinion, arguments & analyses from guest experts and from the editors of Scientific American

Deep in thought: What is a "law of physics," anyway?

One thing that's both disconcerting and exhilarating about physics is how many seemingly simple questions remain unanswered. When you hear the questions that physicists struggle with, you sometimes say to yourself, Wait, you mean they don't even know that?...

June 4, 2010 — George Musser

Web site shows how a tumor grows in 3-D

Ever wondered what it looks like when tumor cells grow inside the body? Drug maker Amgen is hoping to sate this morbid sort of Fantastic Voyage with a new Web site that takes viewers through the various stages of tumor angiogenesis in 3-D...

June 4, 2010 — Larry Greenemeier

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