Original sentence: This led him to author Darwin on Trial (1991), which examined the evidence for evolution from a religious point of view and challenged the assumption that the only reasonable explanation for the origin of species must be a naturalistic one
Edited sentence: This led him to author Darwin on Trial (1991), which examined the evidence for evolution from a religious point of view and challenged the assumption that the only reasonable explanation for the origin of species must be a naturalistic one, though science is defined by searching for natural explanations for phenomena