A black hole forms when a high-mass star dies. It basically emits no radiation (light) hence the name black hole. It's gravitational field is so strong that matter in its vicinity gets pulled in and lost forever. Nothing can escape its gravitational pull - not even light.
I'm sorry I just...
I had a roommate that is a regular user of meth. I recently found out that smoking meth leaves a residue behind that can be absorbed through the skin, which worries me because I let him borrow my car and he smoked meth in it before. I'm kind of a hypochondriac when it comes to health issues like...