Creation

The age of the earth has been arrived at, slowly and step by step, as scientists refine existing methods and discover new ones.

Early in the nineteenth century, Charles Lyell examined the great volcano of Etna on Sicily and studied the historical records of frequent eruptions. He noticed that each time it erupted, a new layer of lava would be added, causing the mountain to grow at a measurable rate. By knowing the height of the volcano, its approximate rate of growth and the frequency of eruptions, Lyell determined that the volcano must be several hundred thousand years old. At the edge of the volcano, under the first lava flows, he found fossil shells that were virtually identical to the shells of molluscs still found in the Mediterranean Sea. From this, he deduced that the fossils were geologically recent, that a hundred thousand years was geologically short and that the age of the earth must be immense. Because of Lyell's research, it was no longer possible to consider the earth to be only a few thousand years old.

In 1862, Lord Kelvin, Professor of Natural Philosophy at Glasgow University and regarded by his contemporaries as the greatest physicist of his day, announced that he had calculated the time it would take the world to cool down from its molten state. He calculated that this was between 20 and 400 million years. Later, Kelvin refined his calculations to within the range 20 to 100 million years and, later still, to some 20 to 40 million years. With the discovery of radioactivity, it was soon realised that the uranium present in the earth prolongs its cooling almost indefinitely. So. Kelvin's method only gives a minimum age, but by no means a true estimate.

Samuel Haughton, an Irish geologist, calculated that sediments were deposited on the ocean floor at the rate of "one foot in 8,616 years". He then calculated a minimum duration of around 2000 million years. Unwilling to accept such a long period, he scaled it back, by a factor of 10, to just 200 million years. This may not be an important dating method today, but it does lend confirmation to other dating methods.

Once the radioactive decay of uranium was discovered, it was only necessary to determine the rate of helium production and the amount of helium that had accumulated, to calculate the age of a rock. In the early years of the twentieth century, Lord Rutherford established the age of a rock as 500 million years, by measuring the amounts of radium and helium present. Strutt soon realised that some of the helium would have escaped as the rocks were crushed for analysis, leading to false short estimates of the ages of the rocks. The rock must have been even older, but the proof of that had to wait.

It was established that lead was the stable element resulting from radioactive decay of uranium. Since lead is not a gas, Holmes decided to determine the age of rocks by using the ratios of uranium and lead. Using rocks from the Devonian age, Holmes calculated that the Devonian age was at least 370 million years ago.

In 1922, Dr Aston discovered a new lead isotope which must have been the end-product of a new isotope of uranium. That isotope of uranium was isolated as uranium 235, which was present in very small proportions to uranium 238 and decayed at a much faster rate. Rutherford used this new information to arrive at an age of 3400 million years for the earth. Scientists were now getting close to the real age of the earth.

Iron meteorites contain almost no uranium, so any lead in them would be 'ordinary' or primeval lead, the amount of which could be used as the uncontaminated estimate for the earth itself, provided that the earth and meteorites had a common ancestry. In 1953, Fritz Houtermans used material from a meteorite to calculate the age of the earth as 4500 million years, plus or minus 300 million. In the same year, Patterson independently produced figures of 4510 and 4560 million years, using a basalt and a granite sample. In 1956, Patterson proved that the earth and meteorites had a common ancestry, thus validating the results.

Holmes felt that it was unsound in principle to rely on meteorites for calculating the age of the earth. He announced that, from terrestrial evidence, he had dated the earth to 4,500 million years, plus or minus 100 million years.

The oldest things so far found on earth and that were formed here are zircon crystals found in Western Australia, that are more than 4 billion years old. Moon rocks have been found to be just over 4 billion years old, evidence that the earth and the moon were formed at the same time and from the same material.

The natural world was created through various natural processes over billions of years, including the formation of the Earth, the development of life through evolution, and the shaping of landscapes through geological processes like erosion and plate tectonics. It is a complex and ongoing dynamic system that continues to evolve and change.

Stabilizing selection is where a population is favored by just the right amount of a certain trait, and if they don't have the right amount of that certain trait then they die.

Example: Human babies and birth weight, if the baby is too small, i gets sick. If the baby is too big, it cannot get through the pelvis; but just the right weight and it will come out lively and well.

Disruptive selection is when an animal has to fit in with its environment; I.E., camouflage.

== == The age of the Earth is roughly 4.6 billion years.

From Wikipedia:

Starting from August 1968, the Glomar Challenger embarked on a year-long scientific expedition, the Deep Sea Drilling Program, criss-crossing the Mid-Atlantic Ridge between South America and Africa and drilling core samples at specific locations. When the age of the samples was determined by paleontological and isotopic dating studies, this provided conclusive evidence for the seafloor spreading hypothesis, and, consequently, for continental drift.

1. The theory of natural selection proposed by Charles Darwin suggests that species evolve over time through the process of differential survival and reproduction of individuals with advantageous traits.
2. The theory of genetic mutation and genetic drift posits that changes in the genetic makeup of a population occur due to random mutations and genetic variations over generations, leading to new traits and species.

Light actually takes time to move, so light that was 13.7 billion light years away would just recently be visible, and we may be able to see the remnants of the big bang. many scientists predict that because they have predicted the universe is expanding and if you look back it makes sense that it all started at 1 point then.

I strongly disagree. I believe that human social and spiritual needs are just as important. If I didn't have caring people. the natural world, the arts around me, what is the point of life. These are the things that make life worth living.

The scientific view on the creation of the world is based on the Big Bang theory, which suggests that the universe began as a hot, dense point and has been expanding ever since. Over billions of years, stars, galaxies, and planets formed through processes like gravity and nuclear fusion. Earth specifically formed about 4.5 billion years ago through the accretion of matter in a disk around the young sun.

That's a bit of a nonsense question. The existence of life is consistent with *any* and *every* hypothesis that tries to explain the existence of life, scientific or not. The existence of life is the very thing that the hypothesis is trying to explain, so necessarily the hypothesis assumes it and must therefore be consistent with it.

The same goes for the *kind* of life we find on Earth: since any scientific hypothesis must explain the life we find here, such a hypothesis must necessarily be consistent with the life we find.

The world never stopped—it's always in motion. If you're referring to a major event or change, it's hard to predict an exact time. Changes can happen gradually over time or suddenly due to unforeseen events.

Well, there isn't really any fact that says the universe is younger than we once thought, but scientists do speculate that the universe might be younger than we thought, because there are theoretical particles (like the graviton, a particle that creates gravity) that say the universe is younger than we think, but since the particles are just a theory, we don't actually know. It just depends on what information you choose to believe in. Currently, common science teachings say the universe is 13.69 billion years old, which is quite old.

A person against intelligent design may be referred to as an advocate for evolutionary theory, naturalism, or scientific materialism. They often reject the idea that the complexity of life is the result of a deliberate, supernatural creator.

In Japanese folklore, lightning is often associated with the deity Raijin, the god of thunder and lightning. Raijin is depicted as a powerful god who controls storms and is responsible for creating thunder and lightning by beating on drums. This mythological explanation helps to personify the natural phenomenon of lightning in Japanese culture.

One theory is that a creator god, perhaps God, Ahura Mazda, Brahma or some other creator god, created the first life on earth. Some believe that God created life in all the forms we now have, while others believe that the present life forms evolved from the first divine beginnings. A second theory is that in early pre-Cambrian times, the Earth was hot and volcanic, lashed by violent electrical storms, and the atmosphere was rich in carbon dioxide, sulphur compounds and ozone. Conditions were ideal for chemical reactions to occur. Complex compounds began to form. Then inorganic molecules combined into even more complex organic compounds, gradually forming amino acids and proteins, the building blocks of life. Over millions of years, some of these compounds formed into simple cells, some of which had the capability to replicate themselves under certain conditions. A third theory is based on the ability of simple crystals to replicate themselves, even replicating any flaws or 'mutations'. Hydrocarbon molecules may have been attracted to the crystals and provided synergy in the replication process. Over millions of years, the process became more complex, while the hydrocarbon molecules began to become the primary components of these 'proto-cells'. Of course, the truth may have been a combination of this theory and the second theory above.

'Evolutionary time' can mean:-

1) 'A very long time'. Just like 'geological time', 'evolutionary time' invokes the idea of processes taking a very long time to occur.

2) 'Effective evolutionary time'. This is a hypothesis for explaining differences in species diversity at different latitudes. Mutation rates are faster and generation times are smaller at higher temperatures, making evolution tend to run faster in warmer climates.

Until the second half of the twentieth century, the Steady State Theory predominated. This holds that the universe has always existed, very much as it does now. Stars may grow old and cold, but new stars are formed out of the abundant interstellar matter. So, the universe will continue to exist as it does now, for many billions of years.

While the Steady State Theory may still have some adherents, the predominant theory among scientists is called the Big Bang Theory. This holds that, about 13.7 billion years ago, an infinitessimally small point exploded to produce the entire universe. Once again, stars may grow old and cold, and new stars form out of the abundant interstellar matter, but the difficulty of infinite existence does not apply. There are at least two, somewhat compatible, hypotheses as to what formed the infinitessimally small point and triggered the Big Bang.

Some scientists believe that the process that triggered the Big Bang could have occurred more than once. If so, there could be many universes, in what has been termed a multiverse. However, we will probably never become physically aware of any of the other universes.

A scientific theory is supported by evidence. Without evidence, it is only a hypothesis.

Organisms change over time through the process of natural selection, genetic mutations, and genetic recombination. Over generations, advantageous traits are favored, leading to the accumulation of genetic changes in a population, resulting in biological diversity and adaptation to the environment. This process is at the core of evolutionary theory, explaining how organisms have evolved and diversified over millions of years.

The Theory of Evolution does not seek to how life began, although there are several very credible hypotheses for the beginning of life on Earth.

The traditional view is that, billions of years ago while the Earth was still hot and there was extreme volcanic and lightning activity, organic chemicals began to form out of the simpler inorganic chmicals that abounded. These organic chemicals became more and more complex, until RNA molecules (the precursors to DNA) formed. Once RNA, and then DNA molecules existed, life was ready to begin.

Another hypothesis is based on the ability of some crystals to replicate themselves, even replicating the defects that occasionally formed. In a 'dirty' environment, carbon atoms could attach themselves to those crystals and become replicated along with the crystal itself. This self-replication is not yet life, but could conceivably lead to the development of life.

Evolution does not propose that the world was created. Instead, it explains how life forms have changed and adapted over billions of years through natural selection and genetic variation. The theory of evolution is focused on the development of life on Earth, not the creation of the Earth itself.

According to Urban Dictionary, Orgism refers to the creation of a parallel universe.

The big crunch theory suggests that the expansion of the universe will eventually reverse, causing all matter to collapse back in on itself. This would result in a dense, hot state similar to the Big Bang. However, current observations indicate that the universe is not only expanding but accelerating, making a Big Crunch scenario less likely.