I don’t think you could see any of those things very easily in other galaxies if they were there. What you can see in other galaxies is chemical compounds—through mass spectroscopy. That shows some of them are rich in “life-like” stuff. Also, there is no shortage of darkish matter out there.
I don’t think you could see any of those things very easily in other galaxies if they were there. What you can see in other galaxies is chemical compounds—through mass spectroscopy. That shows some of them are rich in “life-like” stuff. Also, there is no shortage of darkish matter out there.