Theories on how life began. 5 to 4 billion years ago.

Theories on how life began. Instead, it began somewhere else and was transported to Earth on an asteroid. 7 Ga. May 9, 2018 · Untangling the origins of organisms will require experiments at the tiniest scales and observations at the vastest. Simple organic molecules, similar to the nucleotide shown below, are the building blocks of life and must have been involved in its origin. Scientists have some hypotheses on how life emerged amid such inhospitable terrain. Some of these hypotheses are so bold and imaginative, they feel pulled from the pages of science fiction rather than scientific journals. Jul 19, 2025 · Scientists believe life began with what is called “abiogenesis”—the natural process by which living organisms arise from non-living matter. It continues to be a topic for debate, as May 16, 2022 · 7 Theories on the Origin of Life. Life had a chilly start – Introduction (Image credit: NASA/JPL)Life on Earth began more than 3 billion years ago, evolving from the most basic of microbes into a dazzling array of complexity over time. The vents provided a natural setting for chemical reactions, with compartments that mimic the structure of modern cells. qp9b j0th cb5azt dad otvrhm wia5t bn6xi l9n aff xlp