Question: How did so much life appear on our planet when others seem devoid of any species at all?

Lisa Mullan answered on 3 Dec 2024:

That’s a question that is keeping lots of scientists busy! Earth has a protective atmosphere which keeps us safe and we have developed what is called a carbon based system of life. Lots of the searchs for other life forms are also looking for those that use carbon as thier main chemical source. It could be that there are other life forms using different chemicals and we just haven’t found them yet. Or we are just really lucky to live just the right distance away from the sun – not too hot and not too cold!