Life is thought to have emerged around 4.2 billion years ago, soon after liquid water became stable. The most evidence-supported locations for life’s origin are hydrothermal vent systems on the ocean floor. These environments provided steep chemical gradients, natural mineral catalysts and protective conditions shielded from solar radiation.
HTML5 mp4 https://david.hitchhikers.earth/assets/history-of-the-earth/History%20of%20the%20Earth%20%5BQ1OreyX0-fw%5D.mp4#t=42 First Life (c. 4.2–3.5 Billion Years Ago)
The first organisms were simple self-replicating molecules enclosed within lipid membranes. Over time they evolved into prokaryotic cells resembling modern bacteria and archaea. These early microbes gained energy through chemical reactions with sulphur, iron and hydrogen compounds. The earliest fossil and isotopic evidence of microbial life dates to around 3.5–3.8 billion years ago - wikipedia 