Evolution is one of the most controversial subjects known. Roughly six-in-ten U.S. adults (62%) agree that humans have evolved over time, but only a little more than half of them (33% of all Americans) express the belief that humans and other living things evolved solely due to natural4 processes. The same survey found that 34% of Americans reject evolution entirely, saying humans and other living things have existed in their present form since the beginning of time. A moment's reflection will reveal that maintaining present form since the beginning of time is most unlikely.