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Explore the updated online encyclopedia from Encyclopaedia Britannica with hundreds of thousands of articles, biographies, videos, images, and web sites.

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The Natural Resources Defense Council works to protect wildlife and wild places and to ensure a healthy environment for all life on earth.

Leading source for news, video and opinion on politics, business, world and national news, science, travel, entertainment and more. Our local coverage includes reporting on education, crime, weather, traffic, real estate, jobs and cars for DC, Maryla...

News and features about the latest technology, engineering, and science advances including electronics, computing, energy, biomedical, robotics and more. Get Inside Technology with IEEE Spectrum the flagship publication of the IEEE.

PLoS Biology is an open-access, peer-reviewed journal that features works of exceptional significance in all areas of biological science, from molecules to ecosystems, including works at the interface with other disciplines.

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