All articles tagged with #abiogenesis
A new study suggests that ribose, a fragile sugar delivered to Earth by meteorites, may have helped keep boron dissolved in ancient waters. This dissolved boron, in turn, protected ribose from breaking down, creating a mutual survival mechanism that could have facilitated the formation of RNA and the origin of life.
A new PNAS paper by geochemist Benjamin Tutolo argues that life on Earth is unlikely to have originated in hydrothermal vents given ancient ocean chemistry and vent fluid conditions; vent systems would have been too alkaline, sulfur-poor, and lacked the necessary proton gradients, whereas evaporative lakes or ponds present a more plausible setting for assembling RNA, proteins, and lipids. The work challenges long-standing vent-based origins and implies we should rethink where to look for life elsewhere, though questions remain about lake-based scenarios.
Abiogenesis refers to the emergence of life from nonliving matter through chemical processes. While there is no consensus on exactly how it happened on early Earth, theories include lightning-driven chemistry that could form amino acids and sugars and reactions at deep-sea vents. It’s distinct from the older idea of spontaneous generation, which Louis Pasteur disproved in the 1860s by showing microbes arise from preexisting microbes.
Astronomers detected erythrulose, a four‑carbon sugar, in a Milky Way molecular cloud using radio telescopes at Yebes and Granada, suggesting sugars can form on interstellar dust grains and potentially contribute energy for early metabolic processes relevant to the origins of life.
Researchers propose that life began in prebiotic gels—soft, structured matrices on early Earth that fostered chemical evolution toward protocells, via either phase separation or proto-films, within a protective, biofilm-like environment that shielded and shared resources. This gel-first view broadens the search for alien life to gel-based structures and challenges the traditional cell-first narrative.
Explores the RNA world hypothesis, showing how RNA catalysis and ribozymes—and a ribosomal RNA core—support an RNA-first origin of life, while outlining prebiotic pathways from simple molecules like hydrogen cyanide and noting competing ideas such as amyloid scaffolds and the ongoing uncertainty about proving the theory.
NASA research suggests Titan's lakes may form vesicles with primitive cell walls, supporting theories that such structures could be precursors to life, though this remains theoretical and requires experimental verification.
A 2025 study by Robert G. Endres uses mathematical approaches to show that the spontaneous emergence of life on early Earth was extremely improbable under natural conditions, suggesting that our understanding of abiogenesis is incomplete and that alternative explanations like panspermia remain plausible.
The central question of abiogenesis, the generation of life from not-life, remains unanswered, but astronomers have detected organic molecules and amino acids scattered throughout space, suggesting that Earth's organic compounds were delivered after the planet cooled and solidified. The earliest undisputed fossil evidence for life dates back 3.5 billion years, with more speculative evidence suggesting life started as early as 4.5 billion years ago. It is believed that life may have arisen in deep-sea hydrothermal vents, tidal pools, hot springs, or underground, and it appears that as soon as life could arise, it did arise.
The mystery of abiogenesis, the emergence of life from non-life, continues to puzzle scientists. Astronomers believe that organic compounds crucial for life were delivered to Earth after it cooled and solidified, possibly through cometary impacts. Despite the harsh conditions of the early Earth, evidence suggests that life may have emerged as early as 4.5 billion years ago, with some scientists proposing deep-sea hydrothermal vents or tidal pools as potential cradles for the first life forms. The exact process and location of life's origins remain uncertain, but the evidence indicates that life arose as soon as it could.
A recent paper proposes a new way to understand the origin of life by focusing on the existence of physical and chemical systems that show lifelike behaviors, called ante-life. These systems exhibit viability-based behavior, meaning they change their state in ways that ensure their own continuation. The authors suggest that the origin of life might have involved abiological entities that perform viability-based behaviors, which became more evolvable over time. This view may also provide clues to the origin of agency and autonomy in life.
Scientists are trying to determine if life on Earth evolved only once or if different living beings emerged from different origins. The origin of life is a central question in modern biology, and probably the hardest to study. The current scientific consensus is that life emerged from non-living molecules in a natural process called abiogenesis, most likely in the darkness of deep-sea hydrothermal vents. Abiogenesis could have happened more than once, but all extant life beings descend from a single shared last universal common ancestor of life (LUCA).
Scientists are trying to determine if life on Earth evolved only once or if different living beings emerged from different origins. The origin of life is a central question in modern biology, and probably the hardest to study. The current scientific consensus is that life emerged from non-living molecules in a natural process called abiogenesis, most likely in the darkness of deep-sea hydrothermal vents. Abiogenesis could have happened more than once, but all extant life beings descend from a single shared last universal common ancestor of life (LUCA).