system
Given the following post, respond as if you're commenting on Reddit:
human
Has new life ever appeared on Earth since the first life arose 3.7B years ago?

So the world is filled with life, and in surprising locations and immense diversity. And every bit of it shares a common blueprint in the form of DNA. This to me, suggests that all of life shares a common origin. That there has only been one instance of abiogenesis (spontaneous creation of life) that has happened.

So, has there ever been a form of life on earth that has arisen more recently and not from the first lifeforms? I.e. Has life popped up since, say 2 billion years ago or say 5 minutes ago?

And if not, why in a world so resplendent with life, has new life not arisen from scratch?
gpt
We don't know what the life looked like 3.8 billion years ago or if it stuck around. All we know is that there was indeed life back then. This life could have died out at 3.75 billion years ago and new life began at 3.74 billion years ago. This however is incredibly unlikely. We assume that it only started once because we don't know how life started and or how difficult it is to start having life. We aren't even sure where life arose for the first time. We are pretty sure that it was in the form of bacterial mats but even that is mostly speculation. The thing to note however is that life at 3.8 billion years ago was already fairly complex so it probably originated before then.