Time Magazine has come up with a list of the 50 coolest websites. If you’re one of those people trolling the web during the wee hours, succumbing to ’screen suck’, be sure to check out the Time Wasters  category. Embrace the Sudoku craze by visiting Number-logic.com, where enthusiasts go to compete head-to-head with other online users.

Also notable are the "25 Sites That We Can’t Live Without". The list includes such favorites as HowStuffWorks.com, a site which answers the childlike question "Why is the Sky Blue?", as well as a million others about how things work "from money laundering to hybrid cars, game consoles to the human kidneys".

Angela di Pietro