Maybe dark matter does have electromagnetic interactions with normal matter, but they are at an exceedingly high (or low) frequency. Science has limits in what

Maybe dark matter does have electromagnetic interactions with normal matter, but they are at an exceedingly high (or low) frequency. Science has limits in what frequencies it can probe, matter may not have the same limitations. A century long EM wave would look like background noise on a human scale. Petahertz (and beyond) vibrations could have extremely short range interactions that mostly occur in the near field.