no wait , no wait, did the asteroid come from, and where did the planets come from? how bout where did the stars come from.......... where did the matter that started the big bang come from
i have a feeling im going to get a thumbs down, but who cares
2007-09-18 12:25:25
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answer #1
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answered by daniel 3
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hmm..
anyway, from what i remember, evolution from the extinction of the dinosaurs int he very popular "K–T extinction event" about 65.5 million years ago..
reasons would be massive extraterrestrial impacts or increased volcanic activity or marine regression according to scientists..
it was suspected that evolution was because of the levels of radiation and environmental change led to a better kind of evolution.
Lasting 42 million years, the Paleogene is most notable as being the time in which mammals evolved from relatively small, simple forms into a plethora of diverse animals in the wake of the mass extinction that ended the preceding Cretaceous Period.
Mammals had first appeared in the Triassic(250 million years ago), evolving from advanced cynodonts, and developed alongside the dinosaurs, exploiting ecological niches untouched by the larger and more famous Mesozoic animals: in the insect-rich forest underbrush and high up in the trees. These smaller mammals (as well as birds, reptiles, amphibians, and insects) survived the mass extinction at the end of the Cretaceous which wiped out the dinosaurs, and mammals diversified and spread throughout the world.
so the common misconception that everything died during the K-T extinction event is false..It was already starting..The lizards only got to that point earlier than the mammals..
With the help of radiation/ chemical changes/environmental changes, evolution was better..
anyway, i hope this sheds some light on the situation
2007-09-18 20:02:42
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answer #2
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answered by toffer 3
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It is an interesting theory, although there were mammals living at the time of the dinosaurs, which carried sufficient bio-information to allow the evolution of higher lifeforms. Why there don't seem to be any pre-catastrophe is a good question. The best answer i know is that reptiles were the dominant forms: a simpler (although bigger) lifeform than birds, which were also then evolving, along with the lower mammals. Remember this was 65 million years back, so there has been ample time for evolution to take a LOT of detours.
2007-09-18 19:30:20
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answer #3
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answered by aboukir200 5
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Your assertions about the history of animal life are mostly incorrect. Very serious thought is given to the idea that some key amino acids arrived on earth by means of asteroids. There are two main reasons: (1) All other conjectures of the formation of these compounds are extremely unlikely. (2) These amino acids have already been found on asteroids. Nothing even remotely resembling humans, or human DNA, has every been found on asteroids. It's unlikely they would survive the impact.
The records of fossils, DNA, and modern taxa consistently show clusters or organisms, closely related within a cluster, but unrelated to other clusters. This argues much more strongly for God or some other form of intelligent design than it does for macroevolution.
2007-09-19 00:54:26
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answer #4
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answered by Frank N 7
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You are describing a theory that is called "panspermia"--the notion that the seeds of life or of post-jurassic life came from outer space. Try an internet search on "panspermia."
There is much evidence to suggest that panspermia does not explain the history of life on earth, or describes events that were not necessary for the development of life more modern than the dinosaurs.
In fact, the development of modern life, including the primates, proto-humans, and humans, can be explained just by the passage of time. Lots and lots of time. The asteroid that appears to have ended the jurassic period was 65 million years ago. That's long enough for all the more modern forms to have developed by themselves from what was left after the dinosaurs croaked.
And it's a simpler explanation that does not involve any speculative "cause" riding on an asteroid. Try an internet search on "Occam's Razor."
2007-09-18 19:29:11
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answer #5
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answered by aviophage 7
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Very interesting argument...
However the same thing happened during at least one of our ice ages i.e. a astroid hit the earth...in this case it melted the ice...
now whatever about humans being alive millions of years ago with the dinosaurs, this ice age was only 18000 years ago so if humanity managed to survive an astroid then, whos to say it didn't millions of years ago...
2007-09-18 19:28:43
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answer #6
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answered by Paddy!!! 1
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You haven't heard of it before because it's such shonky logic (and poor spelling), because:-
1. the giant asteroid is not much more than guess. We need an explanation that accounts for crocodiles, turtles, tortoises, snakes and all the other reptiles surviving while dinosaurs were knocked on the head.
2. there weren't humans on earth for about 65 million years after the dinosaurs, so no, it doesn't make common sense. If you said " made way for platypusses, or mammoths, or sabre-tooth tigers " then a bit more possible.
So, no, Matthew David, it doesn't make sense.
2007-09-18 19:34:26
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answer #7
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answered by Tom P 6
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Humans came from the small mammals that hid in burros protected from the ice age. Those mammals were around during the dino age.
2007-09-18 19:27:49
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answer #8
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answered by Rick D 3
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we came from the sea..we were once fish and came on to land and evolved to man
2007-09-18 19:27:26
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answer #9
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answered by Anonymous
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sooooooo, what, you're saying that the asteroid came out of nowhere?
2007-09-18 19:24:26
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answer #10
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answered by Anonymous
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