Abundant physical evidence firmly establishes that the earth is billions of years old (Strachan et al. 2020) and that all organisms on earth evolved from a common ancestor (e.g., Prothero 2017). Nevertheless, the young-earth creationist (YEC) movement aggressively promotes the view that God created the earth about 6,000 years ago and that he independently created each kind of organism during the same week (see, for example, websites such as answersingenesis.org, creationresearch.org, icr.org, and genesispark.com).