Scientists can routinely ...

Scientists can routinely predict a solar eclipse, to the minute, a millennium in advance. You can go to the witch doctor to lift the spell that causes your pernicious anaemia, or you can take Vitamin B12. If you want to save your child from polio, you can pray or you can inoculate. If you\'re interested in the sex of your unborn child, you can consult plumb-bob danglers all you want . . . but they\'ll be right, on average, only one time in two. If you want real accuracy . . . try amniocentesis and sonograms. Try science.
Scientists can routinely predict a solar eclipse, to the minute, a millennium in advance. You can go to the witch doctor to lift the spell that causes your pernicious anaemia, or you can take Vitamin B12. If you want to save your child from polio, you can pray or you can inoculate. If you're interested in the sex of your unborn child, you can consult plumb-bob danglers all you want . . . but they'll be right, on average, only one time in two. If you want real accuracy . . . try amniocentesis and sonograms. Try science.
 Carl Sagan

Quotes from the same author

Imagination will often carry us to worlds that never were. But without it we go nowhere.
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 Carl Sagan
For small creatures such as we the vastness is bearable only through love.
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 Carl Sagan
If the constellations had been named in the twentieth century, I suppose we would see bicycles and refrigerators in the sky.
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 Carl Sagan
Probably a dozen times since their death I've heard my mother or father, in an ordinary conversational tone of voice, call my name. They had called my name often during my life with them ... It doesn't seem strange to me.
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 Carl Sagan
The method of science is tried and true. It is not perfect, it's just the best we have. And to abandon it, with its skeptical protocols, is the pathway to a dark age.
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 Carl Sagan