how science screwed up!

How science screwed up!

Forget for a moment all the stuff they taught us in school and hear me out to the end.
Well don't forget all of it, bear with me, because I'm going to need some of the basic rules they told us.
Ok here goes nothing.
The first law they teach us about hot and cold, is that heat rises and coolness sinks ( goes down basically) yet, get on a plane and fly, the weather gets colder, I know there is a logical explanation to this, but I don't have time for it. Secondly, they teach us that there are no barriers in the sky, or else planes would smash into said barriers, however, go to south Africa in the summer, and you'd find it winter-y, and you'd simply freeze your fingers off! There is and explanation to that too, but who cares?! Why teach us a rule when reality tells you otherwise?!
I live in Jeddah, where in the summer; at least, people could literally die from humidity and heat. How is that possible?! Isn't heat supposed to rise and coldness sink?! Isn't it the concept that made freezers possible?! Why isn't Jeddah cold and wonderful? I know, there's and answer that starts with: the sun, but no matter, science and laws and physics screwed up. And that's all I've got to say.
Good day!
12:10 am
4/9/2008