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Variation in coat pattern in zebras. The patterns show progressively more black left to right and to
Nephroblastoma. A sectioned kidney reveals the presence of a very large tumor, which arose from feta
Cross-sectional data showing that the amount of effort spent on personal health care increases with
Albert Bierstadt, The Rocky Mountains, Lander's Peak, (detail).
Young adults who described themselves as “not being religious at all” had greater stress ...
These photos show a rat burying a test object from which it has just received a single mild shock.