Measuring it in your hand would certainly be tricky. It would probably move straight through your hand – there would be no way to ‘hold’ it. It would have a ‘weight’ though as weight is just a measure of gravitational force, and we do know that dark matter interacts with gravity as does normal matter.
If you know where to get hold of a handful of dark matter let us know and we’ll work out how to weigh it!
- Ivan Teage