Question

When and how did the life begin?​

Answer 1

Answer:

Even the timing of life's origin is in question. All we know for sure is that it happened after Earth formed 4.5 billion years ago, and before 3.4 billion years ago – the time of the oldest confirmed fossils. Many scientists believe that RNA, or something similar to RNA, was the first molecule on Earth to self-replicate and begin the process of evolution that led to more advanced forms of life, including human beings. The earliest time that life forms first appeared on Earth is at least 3.77 billion years ago, possibly as early as 4.28 billion years, or even 4.41 billion years—not long after the oceans formed 4.5 billion years ago, and after the formation of the Earth 4.54 billion years ago.

Explanation: