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As satellites crawl across the sky, they reflect light from the sun back down to Earth, especially during the first few hours after sunset and the first few hours before sunrise.
Read MoreUsing a combination of multiple energy sources, including solar, makes the nation’s energy system more resilient. Solar energy provides about 3% of the country’s electricity overall and about 9% of Arizona’s, according to the U.S.
Read MoreAround the world, countries are on the cyber offense.
Read MoreEye infections are common in rural farming communities. A scratch on the cornea caused during agricultural work can get infected and turn into a scar, then an ulcer.
Read MoreNobody likes sitting in traffic.
Read MoreThe moon is top of mind for many national space programs and private companies, with some planning to send humans back to the lunar surface as early as 2025.
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