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Groundbreaking developments in science, space, technology, health, and the environment

ABCNews.com is your breaking news resource for top stories, videos, photos, blogs, special reports and exclusive celebrity interviews on Good Morning America, World News, Nightline, 2020 and This Week.

Free online calorie counter and diet plan. Lose weight by tracking your caloric intake quickly and easily. Find nutrition facts for over 450,000 foods.

Visit the new XFINITY customer site to get the most out of your subscription. Watch TV online, check email, pay bill and upgrade Comcast subscription.

Tons of useful stuff. The men

AARP is a membership organization leading positive social change and delivering value to people age 50 and over through information, advocacy and service.

Health resources and personalized health tools. Information and news on depression, digestive health, diabetes, breast cancer, cardiovascular health, and much more.

PLoS ONE: an inclusive, peer-reviewed, open-access resource from the PUBLIC LIBRARY OF SCIENCE. Reports of well-performed scientific studies from all disciplines freely available to the whole world.

Popular articles & stories from the Chicago Tribune news archives, including an extensive archive and timeline that can be browsed by date and keyword.

ZocDoc enables you to make appointments for free with dentists and doctors instantly online. Find doctors or dentists who accept your insurance and have appointments at a time of your choice. Read reviews by real patients.

Discovery News digs deep into our world