Category: Nature

Nature is filled with threes. Land, sea, and air. People propagate many plants by three chief methods. These methods are: (1) cuttage, (2) grafting, and (3) layering. Forests a catagirized into three major groups: (1) coniferous forests, (2) temperate deciduous forests, and (3) tropical rain forests.

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Triggerfish

Triggerfish
Triggerfish
A triggerfish is any of several species of tropical reef fishes with laterally compressed bodies, heavy scales, and tough skins. They are named for the mechanism of the three spines of the dorsal fin: when the fish is alarmed the first of these spines is locked upright by the second and drops only when the latter is pressed like a trigger.

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List of Threes in Anatomy

The structure of the human body is organized into groups of three with remarkable frequency. I have listed several examples of this tendency by region. This list does not include structures contributing to form the many “triangles” in the body. If you know of any more, please let me know.

John A. McNulty, Ph.D.

Historically, this was the first hyperlink to the Book of Threes in 1996 thanks to John McNulty . . .

Michael Eck – Author The Book of Threes

To visit John McNulty’s amazing list, click here.

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Whales

Scientists divide baleen whales into three groups. These groups are: (1) right whales; (2) gray whales; and (3) rorquals. Continue reading Whales