Totipotent stem cells can form entire organism; pluripotent like embryonic stem cells form many tissues; multipotent, oligopotent, unipotent become fewer cell types. Yamanaka introduced four transcription factors to reprogram adult cells back to pluripotent state, reversing differentiation. My textbook diagrams it like a branching tree going backwards.
I see this in our old mango tree—one seed holds everything, then it branches to specific leaves and fruits. But sunlight through the sieve reminds me: even that scattered, dancing light on the floor was once the sun’s full power. Reversing feels like trying to gather those scattered dots back into one source—possible in a lab, but in life, some things only go forward.
#running#marathon
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