https://bestlifeonline.com/the-meaning-of-life-and-27-other-major-unanswered-questions-in-science/

1| How exactly did life begin?

Don’t misunderstand us here—evolutionary biologists have a pretty good idea how certain organisms evolved into others, but they still don’t know what kicked it all off. How did we get from the “primordial soup” of the building blocks of life to the formation of self-replicating cells?

The leading theory for the past 50 years has been that an electrical discharge led to chemical reactions that created the first amino acids, but scientists don’t all agree. Some think the causative factor was volcanic action and others think it may have been meteorites that brought life to us.