Regularly science journals and papers come up with new OOL ( origin of life ) scenarios. Here i will anayse them.
Serpentinization is a processes whereby rock (usually ultramafic) is changed, with the addition of water into the crystal structure of the minerals found within the rock.
Transition metal sulfides
From the biological side, many phylogenomic studies conclude that clades exclusive to hydrothermal vents are the deepest branches in the tree of life. Further, most metabolic enzymes that catalyze anaerobic reactions with small gas molecules depend on transition-metal sulfide clusters that have been noted to resemble minerals common to vents
The emergence of life from iron monosulphide bubbles at a submarine hydrothermal redox and pH front
Life on Earth may have begun as dividing droplets
In a primordial soup on ancient Earth, droplets of chemicals may have paved the way for the first cells. Shape-shifting droplets split, grow and split again in new computer simulations. The result indicates that simple chemical blobs can exhibit replication, one of the most basic properties of life, physicist Rabea Seyboldt of the Max Planck Institute for the Physics of Complex Systems in Dresden, Germany, reported March 16 at a meeting of the American Physical Society.
Universal ancestor of all life on Earth was only half alive
One characteristic of almost all living cells is that they pump ions across a membrane to generate an electrochemical gradient, then use that gradient to make the energy-rich molecule ATP. Martin’s results suggest LUCA could not generate such a gradient, but could harness an existing one to make ATP.
That fits in beautifully with the idea that the first life got its energy from the natural gradient between vent water and seawater, and so was bound to these vents. Only later did the ability to generate gradients evolve, allowing life to break away from the vents on at least two occasions – one giving rise to the first archaea, the other to bacteria.
The Emergence of Life as a First-Order Phase Transition
March 1, 2017
Here we present a model for the emergence of life in which replicators are explicitly coupled to their environment through the recycling of a finite supply of resources. The model exhibits a dynamic, first-order phase transition from nonlife to life, where the life phase is distinguished by selection on replicators. We show that environmental coupling plays an important role in the dynamics of the transition. The transition corresponds to a redistribution of matter in replicators and their environment, driven by selection on replicators, exhibiting an explosive growth in diversity as replicators are selected.
Molecules assemble in water, hint at origins of life
February 20, 2013
Researchers are exploring an alternate theory for the origin of RNA: they think the RNA bases may have evolved from a pair of molecules distinct from the bases we have today. This theory looks increasingly attractive, as researchers were able to achieve efficient, highly ordered self-assembly in water with small molecules that are similar to the bases of RNA.
Meteorite Chemicals May Have Started Life on Earth—and Space
April 16, 2015
The molecules that kick-started life on primordial Earth could have been made in space and delivered by meteorites, according to researchers in Italy. The group synthesised sugars, amino acids and nucleobases with nothing more than formamide, meteorite material and the power of a simulated solar wind, replicating a process they believe cooked up a prebiotic soup long before life existed on Earth.
NASA Has Found The Ingredients For Life On Saturn’s Moon Enceladus
(Reuters) – Ice plumes shooting into space from Saturn’s ocean-bearing moon Enceladus contain hydrogen from hydrothermal vents, an environment that some scientists believe led to the rise of life on Earth, research published on Thursday showed.The discovery makes Enceladus the only place beyond Earth where scientists have found direct evidence of a possible energy source for life, according to the findings in the journal Science.Similar conditions, in which hot rocks meet ocean water, may have been the cradle for the appearance of microbial life on Earth more than 4 billion years ago.