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Photograph of a brain specimen with a large malignant tumor.
Electronmicrograph showing a blood clot composed of fibrin, red blood cells, and tissue debris.
The skulls of living haplorhines differ from those of strepsirhines by having large brains, an enclo
The recent mass upheavals in Tunisia, Egypt, Libya, Yemen, and Syria gave political scientists a cha
American people aren't the only ones getting bigger—American pets are also putting on pounds
People who are color-blind see colors differently. (a) Those with normal vision see the red leaves.