Why fortran is still much popular in scientific computing?

Anyone knows why fortran is still so much popular for scientific computing? I read on wikipedia (http://en.wikipedia.org/wiki/Fortran) that fortran is the language used for programs that benchmark and rank the world's fastest supercomputers. I am not an expert programmer but I think C++ and Java are more... show more Anyone knows why fortran is still so much popular for scientific computing? I read on wikipedia (http://en.wikipedia.org/wiki/Fortran) that fortran is the language used for programs that benchmark and rank the world's fastest supercomputers. I am not an expert programmer but I think C++ and Java are more convenient to program and their codes are more readable. Please don't answer in computer science jargons as I'm not a comp. scientist.
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