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"Early Modern Thought Online" (EMTO) is a database offering access to about 13.500 digitized source texts from early modern philosophy and related disciplines like history of science and history of...

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A different astronomy and space science related image is featured each day, along with a brief explanation.

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

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Booksamillion.com offers better prices on the books you want. Millionaire

Celestron Telescopes: Manufactures Celestron Telescopes, telescope accessories, optics, computerized telescopes, binoculars, spotting scopes and microscopes for serious and amateur astronomers and hobbyists

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Prezi is the zooming presentation editor