This type of "religious" sign vandalism just drives me crazy! I realize not everyone believes the Earth is more than 6,000 - 10,000 years old (even they can't agree on the age!), but it is inexcusable for people to vandalize a sign in a national park just because it doesn't agree with their theology. These vandals are not going to change other's minds by removing this information. I'm sure these people would be very upset if their churches were damaged by vandals who didn't agree with their ideas!