How Earth was able to produce life step by step

And which other worlds could have done the same. Looks like answers are emerging.

Colin Robinson
Jul 2, 2020 · 6 min read
Artist’s impression of Earth in Archean Eon, 4 to 2.5 billion years ago, by Tim Bertelink. Via Wikimedia Commons

How could life emerge on a previously lifeless planet? Is life’s origin a chance event, or a stepwise process? Is it likely that worlds other than Earth have also come up with life; and if so, which ones?