Hi,
There is even another challenge on 'time'. Some say it does not exist. There is only the here and now.
Another theory says that time is speeding up, history is repeating itself faster and faster until it ends (2012 ?)
The concept of time is invented to help mankind grasp our earthly existence.
I remember that Jill Taylor (
http://www.ted.com/index.php/talks/j...f_insight.html)
also said she had no sense of time when she had a stroke and her left brain shut off.
Although it's not an answer on one of your original questions it might add an interesting angle of perception.
Cheers