The transition from a "young thumb" to a "mature thumb" involves significant physical remodeling and shifts in behavioral use, whether in human anatomy or gardening terminology. Anatomical and Behavioral Differences
: Young thumbs in children contain growth plates (physes) made of cartilage, which are responsible for lengthening the bone. As an individual matures, these plates calcify or "close," and the bones reach their adult size and shape. mature and young thumbs
: Typically use both thumbs for high-speed typing or a single thumb for "swiping". The transition from a "young thumb" to a
In a botanical context, "thumb" often refers to a gardener's skill (a "green thumb") or the maturity stages of a plant. How Old Do You Text? Guess My Age Challenge with iPhone : Typically use both thumbs for high-speed typing
: A person's "texting thumb" often reveals their age generation.
In humans, the physical structure of the thumb changes remarkably from infancy through adulthood.
: More likely to use a "hunt and peck" style, often holding the phone with one hand and typing with the index finger of the other. "Thumbs" in Gardening (Maturity vs. Youth)