41 ms·
> How do we know it isn't undetectable-through-normal-means normal matter As I understand this is kind of what we think it is, which is why it's called 'dark.'
by grahamburger 10y ago
> How do we know it isn't undetectable-through-normal-means normal matter
As I understand this is kind of what we think it is, which is why it's called 'dark.'