I’m currently watching Carl Sagan’s excellentÂ Cosmos: A Personal Voyage. I feel compelled to post the following quote from episode four, Heaven and Hell, as it stood out for itsÂ elegant argument for the strength of scientific ideas and for not rejecting uncomfortable (if incorrect) ideas:

There are many hypotheses in science which are wrong. That’s all right. It’s the aperture to finding out what’s right. Science is a self-correcting process. To be accepted, new ideas must survive the most rigorous standards of evidence and scrutiny.

The worst aspect of the Velikovsky affair is not that many of his ideas were wrong or silly or in gross contradiction to the facts. Rather, the worst aspect is that some scientists attempted to suppress Velikovsky’s ideas.

The suppression of uncomfortable ideas may be common in religion or in politics, but it is not the path to knowledge. And there is no place for it in theÂ endeavourÂ of science.

We do not know beforehand where fundamental insights will arise from about our mysterious and lovely solar system. And the history of our study of the solar system shows clearly that accepted and conventional ideas are often wrong and that fundamental insights can arise from the most unexpected sources.