left handed people writing in the latin alphabet often find it difficult to write as easily a right handers my question is :in alphabets in languages where it is written from right to left such as arabic it would be harder on right handers. is there due to this a higher incidence of left handedness amoung these languages? and if not, why do they write from right to left considering its greater difficulty to the majority of the population?

does every sperm theoretically account for a different person. for example if 100 sperm had the chance to fertilise the egg. is that in theory 100 different potential lives?

I was sitting at home one day and i seen a white disk go across my eye. it went from right to left in my left eye i think. like it was just randomly traveling past my eye. any plausable explination for this?

about a year ago i had a blood test and when they was taking my bloods i was all tensed up because i hate blood tests. and i started to go light headed intill all i could see in my eyes was grey; faint grey outlines of things. why did my eyes see grey outlines of things if i felt faint or did parcially faint because i couldnt walk properly but i was concious

Clostridium botulinum is the bacterium that causes botulism (a form of food poisioning). The bacterium produces a potent toxin that causes muscle paralysis by reducing the release of the neurotransmitter acetylcholine from motor neurons.  For many other bacteria, the value (from the point of view of the microbe) is clear (for example, cholera is spread by contamination of food and water with feces from infected individuals; the cholera bacterium produces a toxin that leads to massive watery diarrhea which increases the likelihood of contamination), but I don't see how this toxin helps Clostridium.

When you fall asleep you loose sence of time; you feel like you may have been asleep for 5 minutes but it has been a few hours. how is this made possible? why does it feel like you have been asleep for not long when in reality it has been hours.

Using the tools he had/ normal climbing equipment. 

If you only see an object because light going into your eyes and then to the object. why could you see a lit candle if you was in a dark room with the candle being through a door. why can you see the candle but the room you are in is pitch black. if light has to enter your eyes why is the room not illuminated?

Another carbon dioxide question:

When I studied in Germany, there was a time when I lived in a students' dormitory and we had a very small telephone niche on our floor with a door to close in order not to disturb other students by loud talking.

Once after about half an hour of vivid talking with the door closed I felt as if I was going to faint.

I think the air volume in there was only about half as big as in a normal phone booth (their outer measures are 100x100x220 cm in Germany), but the door was less tight.

But I also know that "feeling as if" and really fainting are a long way from each other. I think there are no cases reported of sobre people fainting in phone booths.

How long can one remain concious with, say, two cubic metres of air? Or with one? Or do they have some secret airing system in there?

(good thing everyone has mobile phones now)