I thought to myself, if life was scaled to a day, what time would it be? Carl Sagan did some things like this which I always found interesting like if the age of the universe was scaled to a year, humans would only show up a few seconds before the new year.
Instead of just figuring it out for me I decided to write a web page. So this may be depressing, or inspiration, depending on your age I suppose.
http://cygnusx.com/lifeinaday.php It is quite a no frills page, just wanted to get it done.
Here is a link to Wikipedia on Life Expectancy: http://en.wikipedia.org/wiki/Life_expectancy