I can accept the theory that a meteor hit the earth creating a dust cloud, tidal waves etc.that covered the earth that killed off the food chain that eventually killed off the Dinosaurs. Why would that kill off the Dinosaurs that live in the water? The food chain should still be there and although the oxegon content of the water would probably be reduced, I would think not much?
Mammals survived on land and some large sea animals from that era still exist?.
RE: Mystery of the Oceans & Sea's
I'm sure there's a known answer, and I'd guess it was that a global winter that lasted thousands of years, and made the world MUCH colder from an asteroid hit (bigger than a metorite) had such an effect that plankton died, and over time the oceanic food chain was affected as well. It would probably mean that especially the larger creatures wouldn't survive. The long 'winter' would in other words affect the oceans as much as the land.
Just about all life depends on the sun, photosynthesis, and then the food chain (there's evidence now of microbes etc that don't), and it was hardly there, for land or sea. In fact if it wasn't there at all for just a century or so, that would kill a species. Is my guess. Also formost life, temperatures would fall much further than they could adapt to.
RE: Mystery of the Oceans & Sea's
Dinosaurs where cold blooded and therfore unable to regulate their temprature with a sudden change in it. All mamals are warm blooded and therfore more adaptable. Anything large needed a large amount of food and it just wasnt around after that as many warm and cold blooded species died as a result of this. Bear in mind many species have evolved after this time.
RE: Mystery of the Oceans & Sea's
I basically agree, Grey. On:
ORIGINAL: Grey
Dinosaurs where cold blooded
For about 20 years a number of scientists have strongly speculated that they were not, but warm-blooded. But I haven't kept up with how that debate is going for years. The idea is that yes, they laid eggs, but so does the platypus.
Venetian
RE: Mystery of the Oceans & Sea's
what an enthralling discussion!
cold-blooded, laying eggs, thusorus ...
😉
RE: Mystery of the Oceans & Sea's
ORIGINAL: Fadette
what an enthralling discussion!
cold-blooded, laying eggs, thusorus ...
😉
And that's just the current UK government! 😉
RE: Mystery of the Oceans & Sea's
or so I heard, it is a very old Lizzard family wearing human skin....[:o]
RE: Mystery of the Oceans & Sea's
Wow jbarry, you bring up a very interesting question. Well who says that prehistoric sea creatures do not still exist? They did find the remains of the missing link in evolution, where we came from the sea, and moved onto the land.
I havent done much research, but im confident we could find sea creatures that date back longer than we can think of that still exist today.
I got another question though. Seeing as we did evolve out of the water, when did it happen in relation to the ice age. Perhaps it happened after the ice age. There wouldn't be much life on the surface (seeing as the sunlight was blocked), so everything would be living under the sea (where you dont need light to live). And I guess as soon as the ice started melting, and the dust started clearing, we were drawn to the light(???? what do you think, what compelled creatures to move from sea to land).
RE: Mystery of the Oceans & Sea's
ORIGINAL: venetian
ORIGINAL: Fadette
what an enthralling discussion!
cold-blooded, laying eggs, thusorus ...
😉
And that's just the current UK government! 😉
arn't all government like that?
A big bunch of Dinosaurs feeding off of people.
RE: Mystery of the Oceans & Sea's
ORIGINAL: Elyezual
They did find the remains of the missing link in evolution, where we came from the sea, and moved onto the land.
<snip>
I got another question though. Seeing as we did evolve out of the water, when did it happen in relation to the ice age. Perhaps it happened after the ice age.
Hi Elyezual,
I don't personally accept that a missing link has been found between ocean life and then that moving onto the land. I recall the recent find you mean - one fossil. But you need a whole chain of links and the record remains unclear IMO.
[On ice ages, obviously just to be pedantic let's point out you mean the period following cataclysm, not the Ice Age as normally spoken of, which was just a few thousand years back.]
What we do have of the fossil record indicates that life survived on the surface, on ground. But so many species had been wiped out, it became almost literally like a new planet, with different life-forms. BTW personally I'd never use the word "we" :Dregarding the process as in 'when did we come out of the water'. I don't think it was a world having anything at all to do with human life, and IMO there remains a big mystery about where humanity - homo sapiens and previous peoples - came from.
Venetian
RE: Mystery of the Oceans & Sea's
Researchers say the fish shows how fins on freshwater species first began transforming into limbs some 380 million years ago. The change was a huge evolutionary step that opened the way for vertebrates—animals with backbones—to emerge from the water.
[link= http://news.nationalgeographic.com/news/2006/04/0405_060405_fish.html ]http://news.nationalgeographic.com/news/2006/04/0405_060405_fish.html[/link]
National geographic is definatly a credible source. Im not sure why you would cancel out a possibility if there is theory, and a good amount of evidence to back it up.
Hehehe, looking on the site, check out these tiny little dudes....
[link= http://news.nationalgeographic.com/news/2006/05/060531-hobbits.html ]http://news.nationalgeographic.com/news/2006/05/060531-hobbits.html[/link]
So yea, ice age or cataclysm(doesnt matter anymore), why would we (species as a whole) move from sea to land.
WhenI say we, I mean humans, because the planet is most logically theorized to be coveredin just water in the early days. So, either illogically (we came from outer space) or logically we evolved from the water from whence all life thrives.
RE: Mystery of the Oceans & Sea's
Hi,
I don't doubt the news item in your first link, and that the creature existed. It's simply that the entire history of planet Earth, stretching back untold millions of years, will be an extremely complex one. We only get minute glimpses of it from any fossil. To hail one fossil find as "the" - "missing link" is media-speak. It is an interesting find. But it's one piece of a huge jigsaw, and we don't have the rest.
The fossil helps confirm a reigning theory so gets attention. I wonder ;)how much attention fossils get when they are contrary to reigning theories? Not much, or any attention (witness the books of Michael Cremo on this).
I still don't follow your use of "we" ;)regarding coming out of water. Humans didn't come out of the water evidently (as humans). I didn't. And I believe evolutionary theory taken as the entire story is materialism. I believe in spiritual causes behind physical effects; hence that humans as consciousnesses may not be explained in origin by any physical theory (and aren't, so far - there are too many links missing).
V
RE: Mystery of the Oceans & Sea's
My guess as to the motivation to leave the ocean would be something like this, pre human was a near shore creature somewhat like seal but not the same and this was because the food source was better than out at sea. The shore provided better protection also. The shore had some nasty predators and we wouldescape out of the water to evade them somewhat like the seals and we were lucky that we had someappendages that developed under this pressure to become legs and arms. Later on we developed sunglasses and found out we liked laying on the beach. Ha Ha
RE: Mystery of the Oceans & Sea's
😀
No! No! I really must be my usual pedantic self ... There are absolutely no proven records of sunglasses, or sunloungers, ever being found in the fossil record. 😉
V
RE: Mystery of the Oceans & Sea's
and what about the Loch Ness?
a beautiful scottish tourist trap or a lonely survivor of Jurassic times?
Just was watching a documentary that postulates dinosaurs were killed off by desease such as plague/ anthrax variations and they were trying to find this in ancient dung, this might account for the sea creatures dying out by eating deseased animals near the shore and then sickening the predator? This would be like a death chain.