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Post by vincent on Jun 13, 2015 2:37:13 GMT 10
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Post by dennisw on Jun 13, 2015 12:13:35 GMT 10
I saw this one and thought myself that it implies tool use, octopuses are considered the most intelligent of all invertebrates. Scientific studies are increasingly confirming that they are sentient creatures IMHO they are smarter than some humans.
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Post by johannes on Apr 12, 2018 1:06:37 GMT 10
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Post by Ian Thomas on Apr 12, 2018 19:10:48 GMT 10
Jaws was a mere minnow ..
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Post by johannes on Apr 20, 2018 19:52:18 GMT 10
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Post by Ian Thomas on Apr 26, 2018 3:57:11 GMT 10
Extinctions come in cyclical waves ... or so I've read. Correct me if I'm "up the pole", here. A question then arises: do marine extinctions happen in phase with terrestrial extinctions?
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Post by johannes on Apr 27, 2018 20:13:13 GMT 10
Ian Thomas wrote: The P/T, T/J and K/PG did. On the other hand, some marine anoxic events, like the Cenomanian/Turonian one that killed the pliosaurs and the ichthyosaurs en.wikipedia.org/wiki/Cenomanian-Turonian_boundary_event , were mostly irrelevant for terrestrial ecosystems, although I could imagine that animals who lived on land but depended heavily on anadromic fish for food, like spinosaurs (or some bears today) might have been negatively affected.
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Post by johannes on Apr 27, 2018 22:46:08 GMT 10
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Post by johannes on Aug 26, 2020 0:30:28 GMT 10
www.sciencedirect.com/science/article/pii/S2589004220305344Looks like we have underestimated the Ichthyosaurs. If even an average-sized, primitive ichthyosaur could kill 4m (13-14 ft) long prey, what would humongous* Shonisaurus and Shastasaurus be able to do? Anyway, building structures from shells, bones, pebbles et. does not need sapience - fish do it all the time - and using ihthyosaur bones for making a structure does not mean that the animal using the bones had killed the ihthyosaur. The modern seafloor ist littered with whale earbones, so the triassic seafloor might have been littered with the bones of ichthyosaurs who had died from natural causes. * www.deviantart.com/trollmans/art/Siege-of-Fort-Carcass-747002316 the rauisuchian emerging from the carcass of the beached Shonisaurus is ice-bear sized
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