Life on Earth has existed for more than three billion years
The question when life on Earth has formed is one of the most intriguing, probably not only for modern science, but also for humanity as a whole. In an article published on November 1, 2010 , Earth and Planetary Science Letters [1], the answer is given: life has existed for more than three billion years. In this article, tiny tubular formations found in the pillow of the green-stone belt of the bar-concrete in South Africa and associated with the activities of ancient microorganisms are dated.