Fashion doesn't need a reason other than someone thinking "hey, this looks cool".
As to why THAT happens, well, you might as well ask why some people prefer a certain color, a certain soda or a certain whatever.
They were part of the whole shift in society from men wearing the tight fitted clothes to wearing long/baggy clothes. Blame hip/hop, blame fashion, blame it on Michael Jordan pulling his down, blame expanding waistlines in baby boomers, blame it on whatever you want, but the case is that in the 1980's and before, athletic shorts were SHORT! Look at ANY Basketball game from before 1990, and you will see that the guys were all wearing "short-shorts". I even saw these short-shorts here in the Midwest as far late as 1994. After that, they seemed to vanish. There was a trend in the late 80's for the Bermuda knee-length shorts to become the norm, and now I've noticed a trend 20 years later for the shorter shorts. Look at the new Jack in the box smoothie commercial. Yes, they are trying to be funny, but that jogger is wearing short-shorts!
We will see them come back eventually. It may be another 10 years before they fully catch on like they were pre-1990, but mark my words, they WILL come back.
The Yankees and Cubs are baseball teams. The Miami Heat is basketball. In football there are the Packers, Bears, Patriots, Eagles and Colts.
Yes, absolutely. He has always been a big fan of basketball; he played on his high school team, and to this day, he and his friends play basketball, for fun and for exercise. Mr. Obama is also a fan of professional sports, such as basketball, baseball, and football: he normally follows the Chicago teams, since he lived in Chicago for several decades prior to becoming president.
Actually, it has been decades without radiation that came from the atomic bombs.
Montreal
Frank Sinatra was a professional entertainer for six decades, from 1939 to 1995
Traditional games played in the Virgin Islands are baseball, softball, basketball, tennis and volleyball. The Virgin Islands has produced professional players in each of the sports. Non-traditional sports coming into popularity in the last couple of decades are soccer, cricket and rounders.
Venus Flytraps, with the proper care, can live for several decades (if taken care of by a professional grower).
Thousands... He has been a Professional Wrestling star for over 3 decades
Professional historians 'historicized' the Holocaust over two decades ago, but with many other groups the issue is still intensely emotional.
4.5 decades equals 4.5 decades!
There have been a number of advances in parachutes in past decades. High performance canopies nowadays are of the square, ram-air design (though the actual shape of the canopy is actually rectangular).
No, you don't need a hyphen. It would be 10 decades or ten decades.