Because P (parent) and Ch (child) elide gender distinctions, Gould substitutes two pairs of terms: F (father) and F (fatherling, or man's child); …

The Russian desman, which can weigh half a kilogram, is by far the largest member of the mole family—large enough to be sought for its fur.

Experienced classroom teachers are well acquainted with the attention-seeker, the shy girl, the aggressive boy, the poor concentrator, the slow student […]

However, recent work points to restricted intraciliary rather than cytoplasmic calcium effects subsequently regulating cellular sonic hedgehog signaling.