They've figured out why folks are right or left handed

[LadyStanley]

Epigenetic regulation of lateralized fetal spinal gene expression underlies hemispheric asymmetries | eLife

Study

We Finally Know Why People Are Left- Or Right-Handed
More non-scientific verbiage

According to a brand new study in the journal eLife, however, it is definitively nothing to do with our brains or our neurological development. In a rather satisfying plot twist, it seems that your left- or right-handedness is actually ingrained in your biological workings from before you were born, but in the form of a particular hubbub of gene activity in the spine, not the brain.

But that still means that left-handed folks are in their right mind.

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