Really pisses you lefties off at people being told the greatest commandment is to love your neighbor as yourself. The left foam at the mouth at anyone saying they should not be self centered, your post attests to that.
There are three essential questions we may ask, none with a simple answer: When did life originate? Where did life originate? How did life originate? How does a mix of nonliving chemicals become living? From a scientific perspective, we may find clues for how life may have originated by finding the oldest signs of life possible. We can't ever be sure that what we find is the oldest life on Earth.
We do know that for the first 600 million years or so of its existence, Earth was not a safe environment for life. But around 3.9 billion years ago, things quieted down, after what is known as the Late Heavy Bombardment.
One of the oldest pieces of accepted evidence for life dates from 3.25 billion-year-old hydrothermal vent deposits at Pilbara Craton in Australia. The dates there can be pushed to 3.48 billion years ago. How do scientists date such old rocks? Using well-known radioactive decay techniques based on unstable isotopes found on the site.
Interestingly, chemical fingerprints from the mineralization process show that those living creatures had already a complex metabolism, indicating that earlier, simpler life existed.
Life shouldn't be hard to find in other planets or moons out there, including Europa, one of Jupiter's moons, or Enceladus, belonging to Saturn. Both have oceans of liquid water under a thick icy crust and show promising signs of hydrothermal vent activity.
However old first life was, we know that living creatures with sophisticated metabolisms were moving about and reproducing at least 400 million years after the Late Heavy Bombardment, a blink of an eye in geological time. If anything, this tells us that whatever that early life was, it took advantage of the primal Earth environment to blossom. And, since then, it never stopped — at least on this planet.