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The deer mouse and the African elephant represent extremes among mammals of r versus K selection.
Large size can provide a refuge from predators. While young African elephants may be vulnerable to p
Male Turkmen in the wealthier half of the population had higher fertility rates than those in the po
A sidewheeler on the Mississippi. In 1856 Samuel Clemens became an apprentice to a steamboat pilot a
Marking for Population Study
Three polar bears investigate an American submarine that surfaced in ice-covered Arctic waters.