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Some male birds and mammals congregate in communal courting grounds called leks.
Reindeer antlers grow again each year under a layer of fur called velvet. This reindeer is losing th
The "Emu in the sky," a constellation defined by dark clouds rather than the stars.
Photograph of the flea that transmits Yersinia pestis to cause bubonic plague, called the oriental r
Effect of pH on drug absorption: (a) a weak acid such as aspirin (ASA) is in a nonionized form in an
The upper intake manifold, often called a plenum, attaches to the lower intake manifold.