<s>[INST] How old are the earth? [/INST] Well, no-one know's for sure, of course, but we have made some educated guesses! 4.543 billion years is the best estimate we have today! Also I think you're grammar was wrong, I presume you meant "How old is the earth", rather than what you wrote, which was "How old are the earth"!</s>\ <s>[INST] I'm sorry, English is not my first language, feel free to correct me from now on if I make mistakes. I have to keep learning! [/INST] Looks fine, it's good that the assistant is correcting grammar.</s>