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Online shopping from the earth's biggest selection of books, magazines, music, DVDs, videos, electronics, computers, software, apparel & accessories, shoes, jewelry, tools & hardware, housewares, furniture, sporting goods, beauty & person...

Facebook is a social utility that connects people with friends and others who work, study and live around them. People use Facebook to keep up with friends, upload an unlimited number of photos, post links and videos, and learn more about the people ...

YouTube is a place to discover, watch, upload and share videos.

Welcome to Lens on Leeuwenhoek -- the life, times, and accomplishments of Antony van Leeuwenhoek, who lived during the Dutch Golden Age and discovered the microscopic world of protozoa and bacteria with tiny hand-made lenses.

Prezi is the zooming presentation editor

AbeBooks is your source for Used, New, Rare and Out of print books. Find classic collectibles, rare signed editions, used textbooks, and inexpensive bestsellers from independent booksellers worldwide.

Twitter is without a doubt the best way to share and discover what is happening right now.

Zotero is a powerful, easy-to-use research tool that helps you gather, organize, and analyze sources and then share the results of your research.