Re: If the earths tilt is changed from 23 1/2* to 10*, what would happen??

That is a very interesting question which could be approached from several 
different disciplines.  In dealing with weather, the net result would 
likely be less extremes in the weather. The current 23.5 degree tilt 
results in long periods during the winter without sunlight.  This in turn 
makes the poles very cold while the poles are quite warm.  The large 
difference in temperature between the poles and the equator fuels the 
process of weather.  

If the earth were only tilted 10 degrees, the poles would not become as 
cold as they do and the differences in temperature between the poles and 
equator would be less extreme.  As a result, weather systems affecting the 
middle latitudes would tend to be less violent and the climate more mild.