the.com/embryo
a blueprint folding itself into a body before anyone asks permission.
early heartIt beats around three weeks before any limbs exist.
tail phaseHuman embryos briefly grow and then reabsorb a tail.
frozen pauseEmbryos survive years frozen, then resume developing on thaw.
shared rootsAll embryos start nearly identical across vastly different species.
gill archesFolds that become jaws and ears mimic ancient fish.