Answer:
Explanation:
A millennia is 1000 years. 1999 December 31 just before midnight, ended the millennia from January 1000 to December 31 just before midnight.
 
        
             
        
        
        
Okay, so, just from the top of my head, I think that it is because of the growing belief of "Manifest Destiny" in the nineteenth century.  I'm not sure if this is the actual right answer for your question, but I do know that Manifest Destiny was in the nineteenth century and was the widely held belief in the USA that American settlers were destined to expand through out the continent.  And I think both the USA and Europe wanted to expand, it was kind of a copetition/conflict they had.  This was actually how Canada and Alaska came to be I believe.  This was a simple explanation btw. cx
        
             
        
        
        
A negligible difference. Wind speed of 40 mph generally does not change the temperature of the air that much.
However, I believe you are meaning to ask what the difference feels like if you were subject to these conditions, this is a more complex answer. (Assuming that your skin temperature is greater than 35 degrees) You first need to understand that a change in wind speed would only decrease the time taken for your skin to equalise it's temperature to the surrounding air and thus feel 'colder', this is because more air is flowing over your skin per unit of time.
There are multiple other factors in determining what the 'feels like' temperature would be, such as taking into account the humidity and density of the air combined with our understanding of how heat is lost from the human body.