Science and religion are at odds over this. Earth, Mars, and the rest of the solar system, are 4.5-billion-years-old. How can we tell? The rocks. Religion says that Earth was created in 4004 BC.
If you've seen either the original 1959 film version of the play Inherit the Wind, which is a dramatization of the "Scopes Monkey Trial," of 1925, which saw the two greatest lawyers in American history, fight each other in the courtroom: Clarence Darrow, who was hired to defend John Scopes by the ACLU, (back when it meant something), and two-time presidential candidate William Jennings Bryan, who was brought in as a special prosecutor. What was John Scopes tried
for? Teaching evolution in violation of a Tennessee state law that was repealed in 1967.