Researchers have discovered that environmental genetic changes (epigenetics) can be passed down for an incredible 14 generations in an animal – the largest span ever observed in a living organism.

A team led by scientists from the European Molecular Biology Organisation (EMBO) in Spain took genetically engineered nematode roundworms called C. elegans that carry a transgene for a fluorescent protein. Which when activated, this gene made the worms glow bright under the ultraviolet light.

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