Grand Canyon tests change in water system serving visitorsFLAGSTAFF, Ariz. (AP) — Crews are drilling at the bottom of the Grand Canyon to test the idea of shifting the area where water is drawn to serve millions of people at the national park's popular South Rim….http://hosted.ap.org/lineups/SCIENCEHEADS-rss_2.0.xml?SITE=OHLIM&SECTION=HOMEAP Top Science News at 12:40 p.m. EDTAP Top Science News at 12:40 p.m. EDTTechnology124By FELICIA FONSECA
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