Regeneration or renewal, especially the biological process of regrowing or restoring lost tissue or body parts.
From Greek ana- (back, again) + genesis (origin, creation). It literally means 'origin again,' describing the biological capacity to recreate what was lost.
A starfish can regrow an entire arm, and a newt can regenerate an eye—that's anagennesis in action. It's wild that some creatures can basically 'reboot' parts of themselves, creating brand new cells and tissues following an ancient biological program.
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