[herbst]

There are magnet Implantats you can put into your finger which lets you feel magnetic fields.

[meindnoch]

That's not a new sense, just using the existing tactile system with a magnet.

[iandanforth]

Senses are defined by what they sense, not how they are sensed. A person can have their sight partially restored through implants that bypass rod/cone activation. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6934168/

[meindnoch]

That's still signaling through the optic nerve.

If they would restore vision by using e.g. the cochlear nerve, that would be something.

[knodi123]

you'd be surprised.

I've heard about people experimenting by wearing a belt with dozens of haptic motors and a compass, so that it always indicates the direction of north. After a while wearing it, they stop consciously feeling the sensation of the vibration, and just feel "northness". And then when they take off the belt, they feel weirdly disoriented for a while, even in familiar places.