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| Extinct Animal Questions | |
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| Topic Started: Nov 26 2013, 10:24 PM (193,360 Views) | |
| Incinerox | Sep 2 2015, 05:12 PM Post #2011 |
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Āeksiot Zaldrīzoti
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I'm curious how this would affect the presence of land connecting the two continents. |
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Sep 2 2015, 08:06 PM Post #2012 |
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I haven't researched it, but assuming the gulf current was in the same place (I know nothing about what determines where a current is at a certain time, so I'm guessing here, too) a land bridge would block the gulf current which would significantly cool the global climate. |
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| Incinerox | Sep 2 2015, 11:41 PM Post #2013 |
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Āeksiot Zaldrīzoti
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On the contrary. The Gulf Stream that happens now (starts of in the warm tropical waters of the Caribbean, and ends at the UK) keeps Europe pretty mild compared to Russia or Canada (which are rather extreme on that front). The north Atlantic would be very cold (and probably drier) without it. |
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| Acinonyx Jubatus | Sep 3 2015, 12:17 AM Post #2014 |
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I AM THE UNSHRINKWRAPPER!
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Did Psittacosaurus have pronated hands? Jaime Headden's 2010 reconstruction shows it as such. If it did, what other kinds of dinosaurs had pronated hands? |
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| Incinerox | Sep 3 2015, 12:38 AM Post #2015 |
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Āeksiot Zaldrīzoti
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They shouldn't. Not even derived ceratopsids had fully pronated hands. |
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| Urufu | Sep 3 2015, 04:42 AM Post #2016 |
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did feathered Dinosaurs had Scales or bird-like Skin? do we know something about the Habitat in that Protarchaeopteryx lived? Edited by Urufu, Sep 3 2015, 06:51 AM.
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| Paleop | Sep 3 2015, 09:44 AM Post #2017 |
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Paleopterix
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according to saurian there's a pattern with some dinosaurs. typically the pattern goes: feathers on the torso (avian?)scales on the feet tail can be either or and skin is under both the feathers and the scales ![]() edit: would triceratops morelikely have a few rows of quills along it's tail like this or spikes like this? Edited by Paleop, Sep 3 2015, 12:19 PM.
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| babehunter1324 | Sep 3 2015, 12:24 PM Post #2018 |
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It is worth pointing out that since the skin impressions of T. rex hadn't been formally described. So it might be a bit too early to be sure of wheter they were scutea or something else. That said I think it is quite likely that it was indeed bare, at least on the ventral area. |
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| stargatedalek | Sep 3 2015, 02:54 PM Post #2019 |
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I'm not slow! That's just my moe!
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The fact that the Gulf Stream keeps the UK (and Atlantic Canada, thank you very much...) warmer than the surrounding areas is evidence that those region would have cooled down without it's presence. If the Gulf Stream brings in warmth as you said, why are you claiming Flish is wrong that it would make the areas warm? Don't forget about the last ice age that happened because of the current land bridge between the Americas. It is almost a certainty that there was no land bridge between the Americas allowing sauropods to travel between them. I don't see anything to suggest sauropods were incapable of swimming, but to swim that far is simply unlikely for nearly any non marine animal. Which means to answer the question, yes, there almost certainly were sauropods in north America that whole time. Edited by stargatedalek, Sep 3 2015, 02:59 PM.
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Sep 3 2015, 03:05 PM Post #2020 |
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the North Atlantic yes, but the last time the American glaciers receded was because of the exact opposite. I don't know what caused it, but something caused North Atlantic waters to travel south which melted the ice caps of North America. As far as we know (at least from what I can find, anyways) when ocean currents (Such as the gulf stream, which is a great example of this, actually) cool down, they release heat into the atmosphere. That is precisely why Nova Scotia and Northern Europe are so warm in comparison even to just slightly farther south, the gulf stream begins to cool and release heat into the atmosphere. Now if I recall correctly, prior to the land bridge forming the Gulf Stream flowed into the Pacific and never traveled north. It never entered the North Atlantic, and because heat travels to colder areas when it's released, it travels to the poles, warming them, and making generally a much milder global climate because there's more heat at the equator which dissipates to the poles, which is exactly what we see throughout the Cretaceous. This is just from my brief 20 minutes of research admittedly, so it could be wrong. |
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| Joe99 | Sep 5 2015, 05:12 AM Post #2021 |
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1. what herbivorous dinosaur could adapt to a sirenia like lifestyle 2. are there any filter feeding marine reptiles like baleen whales today 3. how deep can a Steller's sea cow dive |
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| Furka | Sep 5 2015, 05:49 AM Post #2022 |
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3 I don't think we can know for sure but considering they fed on foliage I doubt they'd go in deep waters with no light. |
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| babehunter1324 | Sep 5 2015, 06:15 AM Post #2023 |
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According to the personal accounts of people who interacted with Stellar Sea Cows they couldn't dive at all and were always floating near the surface... I somewhat found that hard to believe. It is more likely that they just didn't dive because the Kelp they ate tended to reach the sea's surface and they didn't dive away from humans because they didn't feel threatened by them... ... And then the carnage begun -__- Edited by babehunter1324, Sep 5 2015, 06:16 AM.
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| stargatedalek | Sep 5 2015, 08:45 AM Post #2024 |
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I'm not slow! That's just my moe!
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1. We don't know of any such creatures, but I would early ceratopsian relatives or ornithopods to be the only groups likely. 2. No marine reptiles, but numerous fish, arthropods, and "pseudo-arthropods" (Anomalocaris relatives namely). 3. Eye witness accounts show us that the animals had great difficulty diving with proficiency even when frightened, so either they were extremely slow or they had something that made/allowed them to be buoyant. |
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Sep 5 2015, 11:36 AM Post #2025 |
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Lurdusaurus was believed to be semiaquatic, actually, so that's probably your best bet for a "sirenian" Dinosaur. |
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