<div>
Thanks all, commenting from the sidelines... 
 
ozo &gt;&nbsp;equinoxes and solstices 
 
nice words there in the lead off position. 
 
aburr &gt;&nbsp;answer is is book length.... astronomically... 
 
good, I'd not like this to be mere simple dictionary lookup ... another nice word there 
 
RobinD &gt;&nbsp;Ancient Egypt / UK 
 
nice contrast. 
 
So far, so 'nice'
</div>

<div>
/sidebar/ 
 
&nbsp;From three [oz] links, an idea or thought here... 
 
1) SEASONAL CALENDARS FOR THE MELBOURNE AREA 
 
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[A] How many seasons are there? 
 
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Five 
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Six 
 
2) CECIL ADAMS 
 
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;;) Haven't heard that name in a long time, do consider it amongst the tops 
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[it appears I neglected to ask 'when'? or 'where'? or about weather] 
 
3) There is a season 
(Turn, Turn, Turn) 
Music by Pete Seeger 
The words are adapted from The Bible, Book of Ecclesiastes 
 
=========================================================== [75/150] 
 
Can anyone comment on other millenia, allude to volcanism, address glaciers, some other influence 

<pre><code class="code-1 nolinks" id="code-125178">http://prisms.mmsa.org/review.php?rid=343
http://www.classzone.com/books/earth_science/terc/content/visualizations/es0408/es0408page01.cfm?chapter_no=04
http://www.physicalgeography.net/fundamentals/6h.html
http://www.uwsp.edu/geo/faculty/ritter/geog101/textbook/energy/earth_sun_relations_seasons.html
http://answers.yahoo.com/question/index?qid=20080428140715AAvADxP
</code></pre>
</div>

<div>
OK, admitting not having thought of so much of that, although I thought it might need some rounding out, if only some season of groundhogs watching the birds fly north for the winter or something. 
 
I considered suggesting someone attempt just some basic math on the impact of differential between nearest and furthest distance from Sol, just vanilla math without thermodynamics or other implications, but that can wait for another day, closing this one up. 
 
Apparently four was the more magical number, introducing the likes of voilin 'strings' and the decades of partnerships. Nice. 
 
Thanks all.
</div>

<div>
<div class="content wysiwyg-content">
 &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; Seasons &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; [75] 
 
(A) [combine] 
 
How many seasons are there? 
How many seasons do you think there should be? 
 
(B) [combine] 
How many seasons could there be? 
How many seasons will there be? 
 
(C) [combine] 
How many seasons were there? 
 
(D) Mix the above together, and what is the result? 
 
 
¤¤ &nbsp; What are seasons really? &nbsp; ¤¤ 

<pre><code class="code-1 nolinks" id="code-124532">/Footnote/
[please try some thoughtfulness, with a measure of the empiracle, this is a question for science, not four math, or that is the intention anyway (unless you insist)] 
[The outline format provided above does not have to be followed step by step for any comment(s) or answerers, feel free to redo any/all of that as be convenient to your point, or dispense with that aspect ratio]
</code></pre>
</div>
</div>

                       Seasons                                 [75]

(A) [combine] 

How many seasons are there?
How many seasons do you think there should be?

(B) [combine] 
How many seasons could there be?
How many seasons will there be?

(C) [combine] 
How many seasons were there?

(D) Mix the above together, and what is the result?


¤¤   What are seasons really?   ¤¤

The seasons they do change, or do they?

The Math / Science topic primarily includes discussions of mathematics, physics, statistics and economic analysis, but also biology, chemistry and other sciences.