What evidence does the author give to support his claim that many brilliant theories may seem impossible at first?

The author gives several examples of brilliant theories that were initially seen as impossible or outrageous before being accepted by the scientific community. For instance, the theory of evolution proposed by Charles Darwin in the 19th century was initially met with skepticism and disbelief, but has since become widely accepted as a fundamental concept in biology. Similarly, the theory of relativity proposed by Albert Einstein was seen as revolutionary and controversial when it was first introduced, but has since been supported by numerous experimental observations and has become a cornerstone of modern physics. These examples demonstrate that many brilliant theories may seem impossible or implausible at first, but with further evidence and research they can be accepted and understood.