Public index · Biology
Neural ~42 days
~42 d
Developmental-biology windows printed as ~42 days on the natural plate
Developmental biology holds many multi-week windows. An exactly 42-day milestone must be sourced per species and endpoint. Not one law of the neural tube.
What it supports
A literature neighborhood the Book already holds. Living only when a named study is attached. Carnegie Stage 23 is the end of the embryonic period, not a sealed 42-day clock. The image of early form is atmosphere, not a dated law.
What it does not
Not the brain turning on at day 42. Not a single 42-day law of human development. The PMC packet on the plate is mixed: gamma-band papers are not embryology. Soft: this as proof of a universal developmental clock.
ExactnessRange / bound
Form42 as duration
Unitdays
Strengthopen