1 Results for

gravitylight

Narrow your search

Content Type
Topic
download

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...

download now
2 total downloads
2 last week
Article

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