When did the first fossils appear?
548009
The earliest evidence of procaryotic bacteria are from about 3.8 billion years ago in stromatolites from cherts in Western Australia (the Warrawoona group). Unicellular eucaryotes can be dated from about 1.6 to 1.8 billion years ago.
840440
Index fossils are fossils of creatures that existed for a short period of time. A good index fossil should also be distinctive (hard to confuse with other creatures from a different period;) wide ranging (its helpful if the fossil appears worldwide) and common (if fossils of the creature are rarely found they are not much use!)\n\nSo, once you know that, say, a certain type of trilobite lived between 570 amd 500 million years ago, you know that any rocks with that trilobite fossil in are 570-500mn years old. This also gives a date for any other fossil found in the same strata.
338600
Adam was the 1st man.\nEve was the 1st woman.\nJinns and dinosaurs were the 1st creatures.
955868
No. The basic geological column was first realised by creationists such as Rev. Sedgewick and William Smith, following logical rules such as the principle of superposition (sediments were deposited on top of older sediments). They observed that layers of different ages contained some different fossils which could aid in recognising the layers, without always having to physically trace them along. This was well before the Origin of Species.\n\nNowdays, the geological column is dated by absolute radiometric methods (eg. Uranium-Lead and Potassium-Argon dating). There are hundreds of radiometrically-dated tie-points in the geological column. Index fossils, along with other methods such as magnetostratigraphy, are used to correlate, relatively, between different locations, and to the radiometrically-determined time scale.
852285
For hundred of years, bones were found in China, labelled "dragon bones" ground to a poweder and used as folk remedies. Discovering a dinosaur bone was not hard, identifying such bones as being from a disappeared animal required a bit more imagination, running against the "teaching" of religious beliefs.\nThe first full dinosaur skeleton discovered which was recognized as such, occured in 1858, 148 years ago (see link).\n\nAs to the number of dinosaur spieces, it must have been nearly one million.  There are 5500 species of mammals alive today, and most of them are less than one million year old (the ancestor of those mammals living today disappared, along with some speices that dies off without leaving descendants). If one assumes that dinosaurs occupied essentially all the ecological niche that mamallians do today (there were tiny dinosaurs the size of mouse, no all dinosaurs were huge) and given that dinosaurs lived and ruled the Earth from 230 million years ago until 65 million years ago (so 165 million years), and assuming that a speice lasts one million years, that is about one million indeed.\nWe will never find them all, many dinosaurs may have disappered without leaving traces that we will ever find.
715442
Origin of the first life.
584737
If you do your research you will see that the concept of time in mens eyes compared to Gods eyes are probably two very different things!\nwe are told to go to the fossil record for final, conclusive proof that evolution really did take place. You might imagine we would find a succession of fossils, for example, starting with shellfish, in which the hard shell gradually turns into a covering of scales, while part of it turns inside and grows into a backbone. At the same time, successive fossils would be developing a pair of eyes and a pair of gills at one end and a finny tail at the other. Finally, lo and behold, we would have a fish!\n\nBut a fish would not stay a fish. Coming on up in the geologic column of sediments, we would expect to find fish changing their fins into legs, with feet and toes growing out of them, and their gills into lungs. Higher up, we would no longer find their fossilized remains in old seabeds but buried in dry land deposits. And in other fish, their forefins would be changing into wings and their back ones into legs with claws. Their scales would change to feathers and they would grow a horny beak around their mouth. And, presto! the magic of evolution would have given us reptiles and birds. So we could line up intermediate forms exhibiting transitional features between every ancestral species and each type of their progeny.\n\nIs that what we really find? Of course not! That would be an evolutionist’s dream. Darwin himself was the first to bemoan the extreme imperfection of the fossil record. But he was hopeful that time would supply the transitional forms between species—missing links, they came to be called. These would vindicate his faith in the process of evolution by natural selection.\n\nBut these hopes have not been realized. What does the record actually show? Each new kind of plant or animal—fern, shrub, tree, fish, reptile, insect, bird, or mammal—appears suddenly in the geologic column. Beginning immediately above the lifeless sediments of the Azoic era, the Cambrian layer carries an abundance of fossil crustaceans and shellfish, in great variety, already fully developed. Plants with woody stems appear suddenly in the mid-Paleozoic. Fossil wood has not been found in lower strata but is abundant in all later ages. Large collections of insect fossils have been found in upper Paleozoic rocks, fully developed and in great diversity, but none have been found in earlier strata. Early in the Cenozoic era, modern types of mammals make a sudden appearance; there is no record of their evolution from earlier types.\n\nThis is the repeated testimony of the fossil record: Sudden appearance of new kinds of plants and animals—no precursors. Does this not suggest, to the unprejudiced observer, the creation of these new kinds in successive ages, rather than continuous evolution?\n\nPermanence of Species\n\nBiologists have devised an elaborate system for classifying different species. Naturalists continue to find species that are different from those already classified, and those are fitted in between the others. Extinct species, represented by fossils, also have been assigned places in the classification. Different fossils continue to turn up that have to be put between others in the system. The evolutionists call these transitional species, a word that implies a temporary existence, during which it falls between an older species and a new one that is to appear. Even calling them transitional reveals a bias in logic. A neutral expression would be “intermediate” forms.\n\nMuch emphasis is put on the search for these “transitional” forms. As an example they point to the lungfish, which has gills for taking in oxygen when in water and also a bladder that serves as a lung for breathing when out of water. This is supposed to have marked a stage in evolution between fish and reptile. But there is a snag in the logic. The lungfish did not change into a reptile. It is still living today, the same
759312
Humans came a long time after dinosaurs, Apart from the Flintstones. and if you wanna know what your ancestors looked like , ME
901364
Thousands of years ago when the first caveman was quick enough to catch himself his first turkey.
826729
its been millions of years
669472
The oldest animal fossils are called Vernanimalcula and are aged at 600 million years.  These are the first organisms discovered that exhibit true animal characteristics.  I don't think bacteria count as an animal....
732062
before 4570 million years !!!!
321654
The Cambrian or Cambrium (500 million years ago) During this time, roughly fifty separate major groups of organisms  emerged suddenly, in most cases without evident precursors. This radiation of animal phyla is referred to as the Cambrian explosion.
404949
Well, I gotta tell you that there's a lot of them.  The paleozoic spans a period from roughly 560 million years ago to roughly 240 million years ago.  There's a LOT of them - the periods are the Cambrian, Ordovician, Silurian, Devonian, Mississippian, Pennsylvanian, and the Permian.  Then we go into Mesozoic life.\n\nI guess maybe an answer would be the types of fossils we find: multicellular organisms, with amphibians being the dominant land animal in the later part.  Dinos don't come around much until the Mesozoic.\n\nOther than that, you get all types of sedimentary rocks and forms as you do now.  Hope that sort of answers your question!
489509
Since before recorded history.  There has been evidence of slavery found in the fossil record.
408149
No one knows if dinosaurs existed, what we know is that fossils of dinosaur bones exist.  The sensible explanation is that dinosaurs did exist and their bones became fossils, but why do you care about what is sensible?  According to the bible the earth was created in 6 days, that is wrong to.  The only time the bible is right is by accident.  Snakes use to talk in the bible.  You have to admit the bible leaves a lot out.  Like if Adam and Eve had 2 sons, and no daughters, where did Cain and Abel's wives come from?
269337
Dinosaurs first appearing approximately 230 million years ago and at the end of the Cretaceous period 65 million years ago. That is alot of weather. For the most part..., it was warmer but depending on where they inhabited..., the era and the climate..., it covers such a wide range...\n\nHumans could have lived but things would have been rough..., not too many mammals around at the time..., just mostly what looked like rats...