Step-by-step process of taking fish teeth impressions: The researchers took teeth molds from Polypterus fish (about 20 cm long); (A) setting up the materials; (B) carefully sedating the fish; (C) ...
Water is a big part of our lives. Whether we're swimming in it, washing ourselves off with it or drinking it, human beings need water to survive. The average U.S. adult drinks about 44 ounces of water ...
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