"It is an odd fact of evolution that we are the only species on Earth capable of creating science and philosophy. There easily could have been another species with some scientific talent, say that of the average human ten-year-old, but not as much as adult humans have; or one that is better than us at physics but worse at biology; or one that is better than us at everything. If there were such creatures all around us, I think we would be more willing to concede that human scientific intelligence might be limited in certain respects."