25 Sites We Can't Live Without

National Geographic.com

Article Tools

There's a ton of great content here — about animals, world adventures, the environment, the sciences, space — plus educational stuff too. Also check out National Geographic's My Wonderful World, which aims to boost your geographic literacy, offering daily quizzes to test your global IQ — and be sure to see the special section for Kids & Teens.

5 Worst Websites

MySpace and Second Life get two thumbs down

Podcast

Debating the List

TIME's Lev Grossman, Anita Hamilton and Maryanne Murray Buechner share their favorite —and most disliked— spots on the web

Talk Back

What's Your Favorite?

Share your thoughts on what you think is the website you can't live without