We offer you a Sculpture of nature, evidence of the creation of life on Earth... Stromatolites are biological constructions, associated with the activity of bacterial colonies. The discovery of such constructions restarts the search for "simple" life forms that could exist on other apparently hostile planets. While the Earth was inhospitable, high temperatures and both saline and alkaline waters (such as volcanic areas), the first traces of life on Earth are estimated between 3.5 and 3.8 billion years ago in microbial form