A hypothesized mechanism for the origin of life, an event called abiogenesis. In this version, called RNA world, small molecules called nucleotides formed in the waters of the early Earth during the Hadean Eon, and polymerized on the surface of clay minerals. These simple chains of RNA could replicate themselves in solution, but only slowly and inaccurately. An RNA molecule developed which would fold into a structure that catalyzed RNA polymerization; a ribozyme. The first ribozymes would replicate their sister strands, and produce copies of themselves and other RNA molecules.
In the same environment, long chains of carbon molecules called phospholipids were formed. These molecules have two parts, the tail, which is hydrophobic, and the head, which is hydrophillic. Because of these properties phospholipids will stick together and form micelles and vesicles in water. Vesicles can absorb RNA nucleotides, concentrating them and creating a space where they can replicate, mutate and evolve. At some point a ribozyme became enclosed within a vesicle, starting a chain reaction that evolved into the multitude of biological forms that we see today.
Because this event occurred more than 3.8 billion years ago, theories about how and where it happened are highly speculative. Possible environments for abiogensis include hydrothermal vents on the ocean floor, hyper saline bubbles of water trapped in ice, radioactive lakes or lagoons on earths surface, and even in space or on another planet, brought to earth through a panspermia event. We have very little molecular evidence of the first cells, but ribozymes and catalytic RNA molecules are embedded in the DNA replication machinery of all life. Because evidence of this event has almost certainly been lost to time, the true mechanisms of the origin of life may remain a mystery to science.
This is Galaxy Cluster Abell 1689. Each glowing orb visible here is a giant elliptical galaxy with more than a thousand billion stars. The mass of this cluster is so great that it acts as a colossal gravitational lens, bending light from galaxies behind it into distorted shapes. Within this image there could be as many as one quadrillion (1,000,000,000,000,000) planets and moons. What events are happening in this tiny patch of sky? Far, far more than we can ever imagine…
This whole existence is in love: these trees are moving tremendously in love; these stars, these rivers rushing towards the ocean, are rushing towards a love-affair where they can meet and merge. Watch, and you will find everywhere the shadow of love, the thrill, the excitement, the ecstasy of love. Whatsoever the form, if you look deeply, you will always find something throbbing at the center which cannot be anything other than love.
A human being is a part of the whole called by us “the universe,” a part limited in time and space. He experiences himself, his thoughts and feelings, as something separate from the rest - a kind of optical illusion of consciousness. This delusion is a kind of prison for us, restricting us to our personal desires and affection for a few persons nearest to us. Our task must be to free ourselves from this prison by widening the circle of understanding and compassion to embrace all living creatures and the whole of nature in its beauty.