Such a long time line would likely need to take place on other planets as well, meaning older planets are more likely than younger ones to support intelligent life. (techtimes.com)
I don't think the Bible gives us answers to the question of how old our planet is, but it does to how it came to be. (religion.blogs.cnn.com)
An ancient magnetic field could have made the 500 - million - year - old planet more hospitable to life, by preventing the Sun's powerful solar wind from stripping away the atmosphere. (scientificamerican.com)