"Epigenetics continues to be just freaking nuts"

I stole the title of this post from the title of this post by Maggie Koerth-Baker over on Boing Boing, where she's sort of the science correspondent, and does a wonderful job of presenting new things from the hard sciences with proper caveats. Regular readers will know I've been posting on epigenetics for quite some time, as it upends what until now was accepted science all my life. Maggie's title and post do a great job of capturing how that feels.

We know that stressful experiences can have negative biological repercussions — not just for the people who experience the stress, but also for their children. Now, there's some evidence that this transfer of stress effects might not just be due to a simple case of PTSD changing the way you raise/treat your kids. In a study that's inspired both deep skepticism and jaw-dropping awe (both with good reason) scientists were able to train male mice to fear a specific smell — and then observe that same fear/stress response to the smell in the mice's children and grandchildren. This, despite the fact that the younger generations never had contact with their trained fathers. These results are crazy enough that you shouldn't take them as gospel. But they are hella interesting and will definitely lead to a lot more research as other scientists attempt to replicate them.