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Some male birds and mammals congregate in communal courting grounds called leks.
The illusory bands visible in this figure are often called Mach bands, although Mach used a ...
Rubella rash in a young child. Rubella is also called 3-day measles or German measles.
Newborns recognize their mother's voice
Cancer cells can move to new locations in the body, a process called metastasis
A thin cleft, called the synapse, separates one cell from another.