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In $1908$ the Olympic Games were held in London, that's just over $100$ years ago. Then, just after World War $2$ they were again in London in $1948$

Here are the results from some track events;

$1908$

$100$ metres $10.8$ secs

$200$ metres $22.6$ secs

$400$ metres $50.0$ secs

$800$ metres $112$ secs

$1500$ metres $240$ secs

$1948$

$100$ metres $10.3$ secs

$200$ metres $21.1$ secs

$400$ metres $46.2$ secs

$800$ metres $109$ secs

$1500$ metres $229$ secs


The 2012 London Olympics were another 64 years later.
How did the results differ?
Could you have predicted the results?
Perhaps more importantly, what's the reason for your answer?

What about the results for 2016, what would you predict?