they are accurate because someone "zeroed" it in, or made it accurate. it is important to understand that that is only done at a specific range. for example, a rifle could be zeroed at one hundred yards, so if you want to hit something at that range, you would put the crosshair directly on it. if you want to hit something beyond that, you would need to use the stadia marks underneath the crosshair to aim above the impact point you want.

not about books, but people say that to me every time i say that inception was stupid.

snorts in infrared

i think in the original novel he was a villain, but the movie portrayed him as more of an anti-hero. both book and film sequel treated him as an anti-hero.

when you think it can't get worse...

>A spokesperson for the police department on Monday could not immediately confirm whether Sidhu will remain on duty.

there are two things going on here and they aren't really related except that they have the same solution. most "dirts" are oils, waxes, and greases. heat softens them and lets the soapy water slip in between the dirt and your skin more easily. it also destroys germs because they don't have a skin. they have a fatty membrane surround, so soap and the mechanical action of washing your hands literally tears them apart.

not all life requires oxygen, for some organisms it is toxic. oxygen is an extremely corrosive chemical that gives off energy (exothermic) when you combine it with just about anything. it is very abundant on earth and in the universe, but not always in a form that can be easily accessed. interestingly, the first organisms on earth used sulphur, which is directly below oxygen on the periodic table, so a lot of similarities.