Motivated by the question What are the theological implications/problems with theistic evolution?, consider that Jasher 4:18 seems to imply that there is something wrong with the mixing of animal species to create "chimeras". The creationists group species into "kinds" but the naturalistic evolutionary view would probably say that the whole thing is a spectrum and that nothing is special about a particular given phenotype other than its current adaptability to the current environment, i.e. everything is just in continuous flux. But if Jasher 4:18 is true, then there is something "divinely special" about certain fixed phenotypes that we see nowadays. The two philosophies are completely in opposition. The technology to create chimeras will surely exist in future. What should a Christian say about chimeras? The view of Jasher 4:18 seems incontrovertible.