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When science looked into how millions of different life forms were on Earth, the only theory they considered, and still consider today, is that all species on Earth were branched off one, or a few, original species, which were simple-celled organisms. The millions of species on Earth today are all from this one, or a few, ancestor species. Since then, all their efforts have gone into proving this theory is correct, and nothing else is considered but that theory.
originally posted by: Phantom423
a reply to: turbonium1
When science looked into how millions of different life forms were on Earth, the only theory they considered, and still consider today, is that all species on Earth were branched off one, or a few, original species, which were simple-celled organisms. The millions of species on Earth today are all from this one, or a few, ancestor species. Since then, all their efforts have gone into proving this theory is correct, and nothing else is considered but that theory.
Could you provide some evidence for that statement? Any biology books, magazines, whatever. Doesn't have to be a professional journal.
The fact is you don't understand science and how it works. Science is discovery and evidence. That's it. If you have evidence for you statements, please post them. Since this is a never-ending topic on this board, there are probably hundreds of supporting articles for evolution that have been posted ad infinitum.
Why don't you take up golf? I would be easier on your brain and good exercise to boot.
We all love our most cherished ideas about how the world and the Universe works. Our conception of reality is often inextricably intertwined with our ideas of who we are. But to be a scientist is to be prepared to doubt all of it each and every time we put it to the test. All it takes is one observation, measurement, or experiment that conflicts with the predictions of your theory, and you have to consider revising or throwing out your picture of reality. If you can reproduce that scientific test and show, convincingly, that it is inconsistent with the prevailing theory, you've set the stage for a scientific revolution. But if you aren't willing to put your theory or assumption to the test, you might just make the greatest mistake in the history of physics.
It's human nature to have heroes: people we look up to, admire, and aspire to be like. In physics, the greatest hero for many centuries was Isaac Newton. Newton represented the pinnacle of the scientific achievements of humanity. His theory of universal gravitation described, faultlessly, everything from the motion of comets and planets and moons to how objects fell on Earth for centuries. His description of how objects moved, including his laws of motion and how they were influenced by forces and accelerations, remains valid under nearly all circumstances, even today. To challenge Newton was a fool's errand.
Which is why, in the early 19th century, the young French scientist, Augustin-Jean Fresnel, should have expected the trouble he was about to get into.
originally posted by: Phantom423
a reply to: turbonium1
You forgot the evidence part. Scientists present evidence for their discoveries. That doesn't make their work set in stone. Science is always an open book.
When you say that scientists never agree on anything that isn't exactly how it works. A theoretical physicist will model his/her hypothesis, work out the mathematics and present it through publication. Remember, not all hypotheses can be tested. Albert Einstein developed his theories when there was no technology to test them. It wasn't until 1919 that Arthur Eddington proved Einstein's theory of relativity using light deflection during a solar eclipse.
The point is science is an additive process. We add new knowledge, subtract what was wrong, in an attempt to get at the fundamental truth of whatever it is we're studying. It doesn't matter whether it's genetics, evolution or mechanical engineering.
Speciation is the evolutionary process by which populations evolve to become distinct species. The biologist Orator F. Cook coined the term in 1906 for cladogenesis, the splitting of lineages, as opposed to anagenesis, phyletic evolution within lineages.[1][2][3]
Charles Darwin was the first to describe the role of natural selection in speciation in his 1859 book The Origin of Species.[4] He also identified sexual selection as a likely mechanism, but found it problematic. There are four geographic modes of speciation in nature, based on the extent to which speciating populations are isolated from one another: allopatric, peripatric, parapatric, and sympatric.
Speciation may also be induced artificially, through animal husbandry, agriculture, or laboratory experiments. Whether genetic drift is a minor or major contributor to speciation is the subject matter of much ongoing discussion. Rapid sympatric speciation can take place through polyploidy, such as by doubling of chromosome number; the result is progeny which are immediately reproductively isolated from the parent population. New species can also be created through hybridisation followed, if the hybrid is favoured by natural selection, by reproductive isolation.
Modern birds descended from a group of two-legged dinosaurs known as theropods, whose members include the towering Tyrannosaurus rex and the smaller velociraptors. The theropods most closely related to avians generally weighed between 100 and 500 pounds — giants compared to most modern birds — and they had large snouts, big teeth, and not much between the ears. A velociraptor, for example, had a skull like a coyote’s and a brain roughly the size of a pigeon’s. For decades, paleontologists’ only fossil link between birds and dinosaurs was archaeopteryx, a hybrid creature with feathered wings but with the teeth and long bony tail of a dinosaur.
These animals appeared to have acquired their birdlike features — feathers, wings and flight — in just 10 million years, a mere flash in evolutionary time. “Archaeopteryx seemed to emerge fully fledged with the characteristics of modern birds,” said Michael Benton, a paleontologist at the University of Bristol in England. To explain this miraculous metamorphosis, scientists evoked a theory often referred to as “hopeful monsters.”
According to this idea, major evolutionary leaps require large-scale genetic changes that are qualitatively different from the routine modifications within a species. Only such substantial alterations on a short timescale, the story went, could account for the sudden transformation from a 300-pound theropod to the sparrow-size prehistoric bird Iberomesornis.
originally posted by: TzarChasm
a reply to: turbonium1
All that ranting and you still haven't refuted even one fact in the theory of evolution, or posted any creationist facts of your own.
originally posted by: Akragon
a reply to: turbonium1
So... there was a horse that lived about 175k years ago that was about the size of a large cat... You're telling me that was the exact same species as the horses we have today
There was also a Rhino that was approx. the size of an elephant.... all the same species right?
originally posted by: Akragon
a reply to: turbonium1
lol... coming from a flat earther of course...
And how do you explain Chihuahua?