Researchers at IIT-Guwahati have developed an eco-friendly alternative to conventional wastewater treatment methods by ...

Erin Patterson is facing trial after pleading not guilty over a fatal mushroom lunch that killed Don and Gail Patterson and Heather Wilkinson.See all 23 stories. Erin Patterson hosted a lunch at ...

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The varying presence of these three elements gives emerald its range of color. Chromium and vanadium make an intense green color. Iron gives the stone a bluish tint. Courtesy of Bill Larson, ...