Injured jellyfish seek to regain symmetry

Self-repair is extremely important for living things. Get a cut on your finger and your skin can make new cells to heal the wound; lose your tail -- if you are a particular kind of lizard -- and tissue regeneration may produce a new one. Now, researchers have discovered a previously unknown self-repair mechanism -- the reorganization of existing anatomy to regain symmetry -- in a certain species of jellyfish.

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