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Solar Impulse Completes Final Test Flight Over San Francisco Before its...
The Solar Impulse just completed its final test flight before it travels across the U.S. without using a single drop of fuel. The plane spent most of yesterday cruising around 3,500 feet over the San...
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Image may be NSFW.
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The Archangel Tree Project Plants its First Cloned Redwoods in Seven Countries
Photo via Shutterstock Back in January we covered the Archangel Ancient Tree Archive , a project dedicated to preserving the world’s old-growth trees by cloning them. This week, in celebration of...
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