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Free learning from The Open University

( Added 171 days ago by: )

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Why Pennies are economically inefficient and should be abolished.

( Added 171 days ago by: )

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pretty cool technology

( Added 188 days ago by: )

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( Added 195 days ago by: )

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Physicist Richard Feynman explains how a train stays on the tracks.

( Added 195 days ago by: )

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Carl Sagan featuring Steven Hawking

( Added 195 days ago by: )

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Zach Wahls, a 19-year-old University of Iowa student spoke about the strength of his family during a public forum on…Read More

( Added 198 days ago by: )

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Visualizing How A Population Grows To 7 Billion

( Added 201 days ago by: )

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This is one reason to wear a safety restraint when in an automobile

( Added 208 days ago by: )

3bb43_wikileaks-vs-facebook-14433-1319082449-14

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( Added 210 days ago by: )

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( Added 212 days ago by: )

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( Added 212 days ago by: )