There is a range of PMBs masses not currently excluded by observation that may explain dark matter, but if dark matter consists of PMBs in that range we're talking on the order of single digits in the solar system per century, not PMBs streaming through you like crazy.
There is a range of PMBs masses not currently excluded by observation that may explain dark matter, but if dark matter consists of PMBs in that range we're talking on the order of single digits in the solar system per century, not PMBs streaming through you like crazy.