The word "dinosaur" does not suggest evolution. As most things like this, they didn't talk to people from the groups that they thought might be offended. Not mentioning divorce is probably sensible.
How is "divorce" bad or offensive. Do children of divorce need to avoid the word? I can understand keeping honestly offensive words out of standardized tests (3 Heebs walk into a deli with $5.45 between them...), but words that are in our common lexicon shouldn't be avoided because it might make some kid somewhere remember that his parents got divorced last year.