WebIf life (one has to say "as we know it" and live with the cliché) is ever going to get started on any planet, carbon is surely needed -- but even before that, life needs flowing water. … WebDec 17, 2013 · The problem of how life began can be considered as a matter of basic chemistry. How did the molecules of life arise from non-biological chemistry? Stanley Miller’s famous experiment in 1953, in which he produced amino acids under simulated early Earth conditions, was a huge leap forward in our understanding of this problem. Our …

Hypotheses about the origins of life (article) Khan Academy

WebLiquid water is required for life as we know it, since only water can provide a universal medium in which self-assembly processes and metabolism can occur. The temperature of the site was likely to have been higher than prevails on the Earth today. WebWater is another very likely requirement for life to arise. Any life which is based on molecules almost certainly requires some kind of liquid solvent to be able to move them around. Although chemical reactions can take place in gases and solids these are much less ideal than liquid. flights to zhuzhou

The origin of life on Earth, explained University of …

The origin of water on Earth is the subject of a body of research in the fields of planetary science, astronomy, and astrobiology. Earth is unique among the rocky planets in the Solar System in having oceans of liquid water on its surface. Liquid water, which is necessary for life as we know it, continues to exist … See more One factor in estimating when water appeared on Earth is that water is continually being lost to space. H2O molecules in the atmosphere are broken up by photolysis, and the resulting free hydrogen atoms … See more Extraplanetary sources Water has a much lower condensation temperature than other materials that compose the terrestrial planets in the Solar System, such as iron and silicates. The region of the protoplanetary disk closest to the Sun … See more • Water on terrestrial planets of the Solar System See more • Dr. C's Ocean World: "How the Oceans Formed" (archived copy) • Nature journal: "Earth has water older than the Sun" See more While the majority of Earth's surface is covered by oceans, those oceans make up just a small fraction of the mass of the planet. The mass of Earth's oceans is estimated to be … See more Isotopic ratios provide a unique "chemical fingerprint" that is used to compare Earth's water with reservoirs elsewhere in the Solar System. One such isotopic ratio, that of See more • Jörn Müller, Harald Lesch (2003): Woher kommt das Wasser der Erde? - Urgaswolke oder Meteoriten. Chemie in unserer Zeit 37(4), … See more WebMicrobial life forms have been discovered on Earth that can survive and even thrive at extremes of high and low temperature and pressure, and in conditions of acidity, salinity, … WebIn the laboratory, astrochemists analyze the spectral signatures of the molecules necessary for life, and then look for those same patterns in young planetary systems. They uncover … flights to zhongxian