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Australia has been in every summer Olympics and some of the winter Olympics.
None - the winter Olympics were never held in Athens. The summer Olympics have been held there several times, though.
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21 times so far. Vancouver 2010 was the 21 Winter Olympiad.
Australia has never hosted the Winter Olympics. It's difficult to host the Winter Olympics in the Southern Hemisphere because it is summer when the games are traditionally played (February)
The first Winter Olympics was in 1924.
The Winter Olympics have never been held in England. The 1908 and 1948 Summer Games were held in England and the upcoming 2012 Summer Games will be held in England.
The winter Olympics have never been held in Australia.
The Games (including summer) have been in Asia 5 times.
Ski jumping has been a Winter Olympics sport since the first ever Winter Olympics in 1924.