how has the earth evolved?
150705
The earth has evolved geologically, chemically, and biologically.  Geologically:  When the earth formed, it was basically a molten mass.  It cooled, and settled into layers, with the densest layers in the center, and the least dense in the crust.  The atmosphere of the early earth was basically methane, ammonia, hydrogen, carbon dioxide, and water vapor.  The hydrogen escaped, the carbon of the carbon dioxide bonded with rock.I don't recall what happened to the rest.  But, when life began, it was life that found oxygen a poison.  However, when photosynthetic organisms appeared, they actually produced oxygen as a waste product.  Some forms of life evolved to be able to use the oxygen to permit them to more efficiently extract the energy from organic compounds.  As far as life itself is concerned, the first organisms, according to the current model, were extremophiles - they were one celled organisms living in extreme environments, such as the volcanic vents on the ocean floor.  Life gradually evolved from simple unicellular to more complex unicellular to multicellular.  Geologically, when the earth was new, there was very little land.  As a result of volcanic activity, grantic crust formed, which underlies the continents.  The continents, or rather the crustal plates on which they "float" have been moving since they formed due to convection currents within the earth's mantle.  So, the layout of the land forms has been changing, and with them, the ocean currents.  This has resulted in a gradual and constant change in climate.
413583
the earth has been around for 4.5 billion years and humans have been around for just a few hundred thousand years and we have only been industrial for 200 years and in the time before that the earth has seen comets,tectonic plate movements, solar flares, a reoccurring ice age, the devastation of an entire dominate species, volcanoes, earth quakes, great floods, and sky blackening fires\n\nthe earth has been thru alot and we as humans are no difference. our planet has seen em come and seen em go and will more than likely out live us.\n\nso the tsunami is a natural part of mother nature and not due to us drilling for oil
675237
The one scientific proof that the earth didn't form over millions of years is that the earth formed over billions of years.
123503
The earth has been destroyed many times.  Ever heard of the "Ice Ages"?  That is how the earth "starts over."\n\nRead this article: http://nov55.com/cli.html
1157600
Evolution is NOT science. There is nothing scientific about it. It is a religion. You cannot prove that we came from nothing. Its not even possible. You cannot create nor distroy matter, thats physics. So then how did all this "matter" around us get here. There has to be a creator. The animals may have different variations but they're still the same kind. Everything comes after its own kind. Same with people, there are tall, short, skinny, big. You'll never get a bannana from a fish. The reason you say the earth is billions of years old is because you think if you give it enough time it might happen. God created everything.
304271
go to\nhttp://en.wikipedia.org/wiki/Earth
17849
ID by ET?  Possible.  But the best scientific evidence so far suggests life evolved here on this planet through natural selection.  Now, however having said that, it is entirely possible for some outside intelligence (God, other divine beings, or ET) to interfere and "nudge" evolution along on a certain direction.  The only drawback to that concept is it's hard to prove or disprove.  However I personally think that the universe was put on auto-pilot mode by a higher intelligence long ago, and that this Intelligence interferes only occasionally or will interfere indirectly (ie: through natural or manmade occurrences) in response to prayer. \n\nHowever, talking about that website specifically...do the Raelians have hard evidence to support their claims?  I would ask for some before I would believe their claims.
245926
It is a very good question.  Just looking at entropy at a universal level, the earth as it is now is not very probabably.  On the other hand the formation of galaxies, stars and planets follows the entropic evolution of the universe quite well.\n\nGiven you have well over 100 billion galaxies, each with 100 billion stars, even very low probabaility events should be around.\n\nAlong these same lines of considering all the things that are low probability that helps make earth the happy place for life that it is, especially with regard to the search of life elsewhere, I recomend you take a look at the book "Rare Earth," it's not militant wackery, but rather a look at all the things that might make earth faily unique in it's ability to harbor advanced forms of life.  It was written by a pair of very well respected scientists from the University of Washington.
806860
The earth had like 20 babies.  They are other planets.  They are all grown up and have moved away to other galaxies.  Now the earth uses birth control, so this doesn't happen any more.
657093
Rocks tell the story of the Earth. The Earth is made of rock, from the tallest mountains to the floor of the deepest ocean. Thousands of different types of rocks and minerals have been found on Earth. Most rocks at the Earth's surface are formed from only eight elements (oxygen, silicon, aluminum, iron, magnesium, calcium, potassium, and sodium), but these elements are combined in a number of ways to make rocks that are very different.\nRocks are continually changing. Wind and water wear them down and carry bits of rock away; the tiny particles accumulate in a lake or ocean and harden into rock again. The oldest rock that has ever been found is more than 3.9 billion years old. The Earth itself is at least 4.5 billion years old, but rocks from the beginning of Earth's history have changed so much from their original form that they have become new kinds of rock. By studying how rocks form and change, scientists have built a solid understanding of the Earth we live on and its long history.
111774
we evolved from one specific species of apes. evolution is a constant, dynamic process, that cen be seen even now as you look around. you have to be intelligent and have common sense and pay attention, and not beleive everything that is written. for proof, just look at the weather forecasters - almost everything they say is wrong, or they just flat out lie. I think they lie - nobody could screw up that much and keep a job.
894605
Fine. I'll level with you.\n\nI believe evolution is possible. I think that certain organisms have developed over time to better their "fitness" (if you will). However, I am a Creationist and believe that God created the Earth and the creatures on it. Sorry if I find it hard to believe that a blob evolved into the life on the planet today.
484046
Two main sources.  The first is that when the earth formed, it was very hot. The earth formed from a cloud of gas and dust, and then gained size from larger asteroids crashing into it for millions of years.  This left the early earth as a ball of lava. Because the earth is so large, it cools very slowly.\n\nSince the earth cooled from the outsize in, it eventually formed a crust, which insulates the inside even more, and slows down the cooling process. A good portion of the heat inside the earth is left over from its creation, about 4.5 billion years ago.\n\nThe other source of heat is the decay of radioactive elements inside the earth.  In the liquid early earth, the heaviest elements would have sunk to the middle. The earth's core is believed to be made mostly of iron, but there are traces of uranium and radioactive isotopes of  thorium, and potassium.
390729
Thank you viking I thought I was the only sane person on earth. The worlds climate has changed constantly since the earth was formed. Its simple geology. What about the volcanoes spewing gas into the atmosphere constantly. The earth is under constant change.
7283
It depends on which theory of creation you believe.  \n\nIf you subscribe to the theory of evolution, the Earth is believed to be approimately 5 billion years old.\n\nIf, however, you base the age of the earth on the bible, the earth is around 6,000 to 10,000 years old.
333457
How did evolution change over time? You mean...how did evolution evolve?  Heh.  The evolution of evolution.  That's funny.
519862
It is a myth....a bedtime story.  The Earth was formed over millions of years.