A while back, I came up with a magic system designed for a scientifically-oriented book, but am not sure if its actually scientifically possible/explainable. It goes like this:
Magic is a product of human (and sometimes animal) cognitive activity, just energy manipulation by electromagnetic fields produced in the cranium. Not everyone can do it because most people have thicker skulls and/or less power to the magic centers of their brains, but some people with a sort of genetic mutation have thinner skulls and/or more power to the magic centers of their brains, allowing them to actively use magic. Any mage can produce either of two types of magic, "volatile" or "permanent". Volatile magic requires them to actively power the spell, keeping it on with their own concentration. Permanent magic is far more complicated and uses heat energy to keep "entwined" electromagnetic fields on atoms/molecules/entire objects working. That way a spell can be produced that maintains itself. Power is limited based on total current to magic centers, thickness of skull, and skill.
Is any of this scientifically plausible, given scientific knowledge of the 21st century?