We also have perfectly good hypotheses and experimental evidence for how first life formed 3.5 billion years ago. (religion.blogs.cnn.com)
The Earth is billion years old; billion years ago, the very first life form came into existence; 225 million years ago, dinosaurs came Scientists have calculated that Earth is billion years old, with an error range of 50 million years. (myintimcity.com)
Instead, it looks like the very first life forms may have used a mix of these and other nucleic acids for genetic material. (newscientist.com)