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Most aquarium tunnels are cylindrical in shape, though tunnels can be made elliptical to make them wider and still keep the top of the tunnel closer to the visitors, or even square.
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Professor Abolghasem Ghaffari, an Iranian talent who attracted Einstein’s admiration.
Abolghasem Ghaffari (born June 15, 1967 – died November 14, 1993) remains one of the …