Not all. The original theory of the Big Bang was formulated by a scientist and Roman Catholic priest from Belgium,
Father Georges Lemaître in 1927. If memory serves me correctly, the scientific community of the time thought that Lemaître's idea was ludicrous (and not scientific). Today the Theory of the Big Bang is one of the main theories on the origins of our universe....
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titan,
An interesting post. Actually, the Big Bang theory is a good example of how science works. When it was first proposed, it had no supporting evidence so it was appropriately treated by science as an interesting speculation (called a hypothesis). One thing that the hypothesis predicted was that in the billions of years between the big bang and now, the left over energy of the explosion would be evident in microwave radiation from outer space with a particular spectrum of an object with a temperature of a few degrees Kelvin.
In 1933, a
telephone engineer looking for the source of interference on very long distance telephone transmissions discovered to his surprise that the interference was coming from outer space. On further investigation, it was discovered that the spectrum of the interference matched the predicted big bang black body radiation background. And the direction of the interference came from what the supposed was the center of the universe.
This was what was needed for the interesting black body hypothesis to be promoted to the status of a scientific theory. It has continued to be useful in explaining past observations and predicting future ones.
It is a travesty for science deniers to turn this into a kind of "scientists laughed at idea X and idea X turned out to be true." story. What they are doing is turning one of the most reliable and successful processes in the world to evaluate an idea, continually challenge it and put it to astonishingly useful work, and instead demean it by casting it as scientific dogmatism overturned by some other process.
Who do people think actually proves these things to be true? It is science that ends up correcting itself through this process of healthy scepticism followed by careful experiment and independent verification. There is no other intellectual activity in the world that comes with such a rigorous, objective and successful process for discovery and modification of its intellectual property.