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A man looks at solar panels at the Taleghan Renewable Energy Site in Taleghan, 99 miles northwest of Tehran, Iran on June 22, 2014.
A man looks at solar panels at the Taleghan Renewable Energy Site in Taleghan, 99 miles northwest of Tehran, Iran on June 22, 2014.
Image: Ebrahim Noroozi/Associated Press

Sunlight-Concentrating Device Could Halve Solar Power Cost

A new material, combined with a cheap tracking system, could unleash the promise of concentrated solar power. A material with optical properties that change to help it capture more incoming sunlight could cut the cost of solar power in half, accordin...

A wounded Ukrainian soldier (C) walks away from a Ukrainian helicopter (unseen) with his comrades on July 31, 2014 in a field near Zaporizhya, after a military operation in Ukraine's eastern regions.
A wounded Ukrainian soldier (C) walks away from a Ukrainian helicopter (unseen) with his comrades on July 31, 2014 in a field near Zaporizhya, after a military operation in Ukraine's eastern regions.
Image: ALEXEY KRAVTSOV/AFP/Getty Images

At Least 10 Ukraine Soldiers Killed Near MH17 Crash Site

Pro-Russian insurgents killed at least 10 Ukrainian paratroopers in an ambush overnight near the Malaysia Airlines Flight 17 crash site in eastern Ukraine, military officials said on Friday.