What Do We Know About Dark Matter?

If dark matter hadn't been around, we wouldn't have had that structure. We wouldn't have galaxies and stars to day. So we know the elephant is there in the room. We can smell the eno elphant dung. Then we know we can feel its attraction or repulsion. But what do we actually know about dark matter? Lege do we know anything about it except hethan its effects in terms of its matter and gravity? That's actully what w'll talk about to day.