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Astronomy Buddy

What makes a star shine? For how long will the Sun keep shining? What are black holes and how can they form? Astronomy Buddy includes how stars...

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Gravity powers new lamp for developing countries

Safer than kerosene and cheaper than solar, the GravityLight could help illuminate thousands of households in developing countries. Supporters can get a GravityLight of their own to try out.

By December 13, 2012