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We do not (yet) have direct evidence that on others planets, their satellites, as well as in interstellar space there is life. And yet, there are compelling and highly compelling reasons to believe that in time we will find such life, maybe even in our solar system. Here are seven Reasons Scientists Believe Life Is Sure exists and is just waiting for a meeting with us. Maybe it won’t be green-skinned ladies in flying saucers, but it will still be aliens. 1. Extremophiles on Earth One of main questions is whether it can exist and develop life in worlds radically different from earthly. Sounds like an answer to this question is affirmative, if you think about the fact that even on extremophiles, or organisms capable of survive in extreme conditions of heat, cold, exposure poisonous (for us) chemicals, and even in a vacuum. We found alive creatures that live without oxygen at the very edge of the red-hot volcanic vents on the ocean floor. We found life in brackish ponds high in the Andes mountains, as well as in icy lakes Arctic. There are even tiny organisms called tardigrades (Tardigrada), able to survive in a cosmic vacuum. So we have there is direct evidence that life can be quite successful to exist in a hostile environment on Earth. In other words, we know that life is able to survive in the conditions that we observe on other planets and their satellites. We just haven’t found her yet. 2. Evidence of the availability of starting materials and prototypes life on other planets and satellites Probably life on Earth originated from chemical reactions that over time formed cell membranes and proto-DNA. But these primary chemical reactions could begin in the atmosphere and in the ocean with complex organic compounds, such as nucleic acids, proteins, carbohydrates and lipids. There is evidence that such “predecessors lives “already exist in other worlds. They exist in the atmosphere of Titan, astronomers noticed them in the rich environment of the Orion nebula. Yet again, this does not mean that we have found life. However, we found the ingredients, which, according to many scientists, contributed to the development of life on The earth. If such ingredients are common throughout the universe, then it is possible that life appeared in other places, and not just on our home planet. 3. Fast increasing number of planets similar to Earth Last a decade, heavenly body hunters discovered hundreds of planets outside the solar system, many of which, like Jupiter, are gas giants. However, new methods for finding planets allowed them find smaller, harder worlds like Earth. Some of them are even in orbit around their stars in the so-called “habitable zone”, that is, at such a distance when they temperatures close to earth arise. And given the huge many planets outside the solar system, it is likely that on one of them there is a certain form of life. 4. The huge diversity and resilience of life to Earth Life on Earth developed in extremely difficult conditions. Sometimes she managed to survive the most powerful eruptions volcanoes, meteorite impacts, ice ages, droughts, oxidation oceans and radical changes in the atmosphere. We are also observing incredible diversity of life on our planet for quite a short period of time – geologically. Life is also a pretty persistent thing. Why shouldn’t she be born and not take root on one of Saturn’s moons or in another starry system? 5. Secrets surrounding the origin of life on Earth Although we have theories about the origin of life on The earth in which the previously mentioned complex carbon molecules is ultimately a big mystery how such chemicals combined to form brittle membranes that eventually become cells. And the more we learn about what an unfavorable environment existed on Earth when life was born and developed – an atmosphere filled with methane, boiling lava on the surface – the mystery becomes a mystery origin of life. There is one general theory that states that simple unicellular life actually originated somewhere in elsewhere, maybe on Mars, but they brought it to Earth meteorites. This is a theory of pansermia, and it is based on the hypothesis of that life on earth came about through life on others the planets. 6. Oceans and lakes are widespread, by at least in our solar system, life on earth originated in the ocean, and it follows that from the water it could appear in other worlds. There is strong evidence that once water flowed on Mars freely and abundantly, but on a satellite Saturn’s Titan has methane seas and rivers flowing along its surface. It is believed that the satellite of jupiter europe is one a solid ocean warmed by the crust of this moon and completely covered a thick protective layer of ice. In any of these worlds could once life exists, and maybe it exists now. 7. Evolutionary theory People often use the Fermi paradox in as evidence that we will never find a reasonable life in our universe. On the other side is evolutionary theory postulating that life adapts to those around it conditions. Darwin and his contemporaries hardly thought about life on planets outside the solar system when they created their theory evolution, however, they argued that where life can take root, she will definitely do it. And if you think that our environment is not only planets, but also other stellar systems, and interstellar space, then you can make the original assumption within the framework of the interpretation of evolutionary theory – that life adapt to outer space too. One day we can meet creatures that have evolved ways that are unthinkable to us. Or we ourselves can someday become such beings.
Water Time Universe DNA Life Mars Saturn Solar System Jupiter
