
New Study Reveals Ancient Origins of LUCA Early Life on Earth
Once upon a time, Earth was a barren planet. That changed dramatically when, out of the chemistry present during its early history, something began to squirm processing matter to survive, reproduce, and thrive. The nature of that something, and when it first appeared, have puzzled humanity for as long as we have been able to ask, "What am I?"
Now, a groundbreaking study has provided some answers, revealing that life emerged surprisingly early in Earth's history. By analyzing the genomes of organisms alive today, scientists have determined that the last universal common ancestor (LUCA) the first organism that spawned all current life on Earth emerged as early as 4.2 billion years ago.
Given that Earth is around 4.5 billion years old, this suggests that life began when the planet was s...