All the top stories on Google News are from the past couple hours. It's the same with the main sidebar on CNN.com. So if you don't check the internet until the evening, and you want to know what the day's top stories were, then you might be out of luck if there was an important story around 10:00 A.M.
The 10:00 A.M. story might be gone by the evening. Is there a website that just shows you the top stories from the past day? Like, a website that combines elements of a static newspaper...? (Is the answer really obvious here?)