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My following comments are not intended as cynicism, trolling, fatuousness, or any other negative descriptor, I ask a basic question to which I would be interested in learning some of the possible answers. Does it matter? Not, whether or not everyone's given up on this thread, but does it matter whether virtual particles are real or not? Virtual particles 'perform' at scales of time and space, and in a medium, that is utterly beyond the experience and mental acuity of a bunch of hyped-up African Apes to understand without the application of a pile of complex metaphors (disguised as mathematics). In my first year of science at secondary school one of the teachers misquoted someone (and I misremembered the misquote) as defining an atom as "a hole, in a hole, round a hole, on a hole". I have been more than comfortable with that definition ever since. I accept the decriptions of atoms and particles and fields and forces as being convenient labels to help us take a stab at describing "what's going on". But the map is not the territory and an art critic's review of a Picasso is most certainly not the Picasso. Do I have it wrong?

80's Aussie TV........this was supposed to be for children entitles "Cartoon Corner" Obviously out takes.

If you measure the temperature of your breath coming out of an open mouth vs pursed lips right at your mouth the temperature will be the same. When you blow out of pursed lips the higher velocity breath entrains the surrounding air so it is much cooler even a couple inches from your mouth. The temperature of the air from a fan is the same temperature as the surrounding air. The reason that moving air cools you is 2 fold. First the moving air will increase evaporation of any sweat on your skin, cooling you. Secondly, if the ambient air temperature is less than your skin temperature the high mass flow of air will transfer more heat away from your skin due to more cool air molecules per second hitting your skin than stagnant air, cooling you. If the ambient air temperature is above your skin temperature and there is no sweat or moisture on your skin, then a fan will heat your skin making you hotter. This is because the higher mass flow of air means more hot air molecules per second are hitting your skin than stagnant air, transferring more heat to you. Heat transfer is always from hot to cold.