> Chips of rare-earth magnet epoxied to your fingernails let you sense the magnetic fields around you.
Your body already feels magnetic fields around you... you have iron in your blood.
Your body already feels magnetic fields around you... you have iron in your blood.
It’s still a debate how animals sense the earths magnetic field. However, all theories rely on special adaptions and not on the extremely weak magnetic properties of blood.
There are languages where grammar requires all directions are absolute, and even three-year-olds speaking those languages never get them wrong. I don't know of any studies to show they really are referenced to magnetic north, or are misled by artificial magnetic fields.
There is probably an easy PhD in showing such an effect.