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Lick your rat

Some mother rats spend a lot of time licking, grooming, and nursing their pups. Others seem to ignore their pups. Highly nurtured rat pups tend to grow up to be.

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Description:The nurturing behavior of a mother rat during the first week of life shapes her pups' epigenomes. Rats and people with higher levels of GR are better at detecting cortisol, and they recover from stress more quickly. The study showed that there are epigenetic differences between high- and low-nurtured rats. It is likely to reach a high social standing, and it doesn't have to worry about where its next meal is coming from. High levels can lead to heart disease, depression, and increased susceptibility to infection. So take heart -- your epigenetic destiny is not written in permanent ink.

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