Epigenetics: Why Inheritance Is Weirder Than We Thought

The video explores how rats can inherit learned fears through epigenetic changes, which alter gene expression without changing the DNA sequence. This phenomenon is not limited to rats; similar patterns have been observed in humans, such as in Sweden, where famine survivors' descendants showed improved health. The video highlights the complexity of epigenetic inheritance and the challenges in studying it in humans due to environmental variability.

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