tag:blogger.com,1999:blog-6868618319990879375.post4185200686679711607..comments2023-10-26T17:50:34.134+00:00Comments on Fish Feet: What were T. rex’s tiny little arms for anyway?Sarda Sahneyhttp://www.blogger.com/profile/15304436221452464387noreply@blogger.comBlogger30125tag:blogger.com,1999:blog-6868618319990879375.post-51045542475018971162015-06-04T17:24:03.033+00:002015-06-04T17:24:03.033+00:00What if they were used for defense? If a T. Rex a...What if they were used for defense? If a T. Rex attacked a much smaller dinosaur, the other dinosaur may not be able to reach it's head/neck to fight back. Therefore, the dinosaur would be forced to attack something it could reach: the legs/belly of the T. Rex. If the smaller dinosaur got underneath the T. Rex in order to attack, then the T. Rex wouldn't be able to reach with its mouth. The arms of the T. Rex might be able to push the dinosaur back forward so it can be bit. It would also explain some of the broken arms.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-6868618319990879375.post-89080123369123469142014-12-07T11:46:38.057+00:002014-12-07T11:46:38.057+00:00I it's a simple question of energy. It takes e...I it's a simple question of energy. It takes energy to grow anything, so if tyrannosaurs evolved a larger skull and longer tails and legs to compensate, they would have had less energy to expend on growing long 3-clawed arms. Think about their prey: hadrosaurs and ceratopsians. They were smaller than most tyrannosaurs so could be killed with an ambush attack and a quick bite to the neck or head area.<br /><br />Now think about earlier theropods, allosaurs etc. They were targeting sauropods, potentially in packs, so they still needed relatively long arms for slashing and gripping, like dromaeosaurs (raptors). Even so, their arms weren't particularly long and subsequent cretaceous allosaurs (abelisaurs, Giganotosaurus etc.), correct me if i'm wrong, had even shorter arms.<br /><br />In general, the bigger theropods got, the smaller their arms became, so I really think energy and prey type is the key. This theory does fall down with Carnotaurus though as it also lived alongside sauropods. Perhaps it had smaller prey?<br /><br />P.S. the scavenger theory is interesting but if T. rex was sticking its head inside corpses it wouldn't evolve a bugger head....think of the long neck and small head of a vulture.Anonymoushttps://www.blogger.com/profile/12510402125987121723noreply@blogger.comtag:blogger.com,1999:blog-6868618319990879375.post-14560311653874130072014-05-13T03:38:35.452+00:002014-05-13T03:38:35.452+00:00Perhaps the forelimbs were vestiges of wings, the ...Perhaps the forelimbs were vestiges of wings, the neck an s curve, the tail short, and feet directly beneath. The usual picture of t rex isnt balancedAnonymousnoreply@blogger.comtag:blogger.com,1999:blog-6868618319990879375.post-90719120885854835962013-06-04T03:18:01.353+00:002013-06-04T03:18:01.353+00:00OOO! They were super strong right? So maybe they w...OOO! They were super strong right? So maybe they were for when the T Rex slept, or even when it fell. It would need some sort of leverage to get up right? This would explain why they'd break so often (to brace a fall). Did I just make the scientific discovery of the century? Who knows, but I'll put my name at the bottm just in case. ;)Freddy Hodgeshttp://www.facebook.com/ImpeccableMiscreantsnoreply@blogger.comtag:blogger.com,1999:blog-6868618319990879375.post-60538032839363371502013-05-14T12:34:10.412+00:002013-05-14T12:34:10.412+00:00This may be a little out of the box but I did send...This may be a little out of the box but I did send this idea to the curator at the AMNH.<br />Suppose T. rex, after a kill, would consume its prey as the large cats do today. After chasing down and killing their prey, the large cats go down in a prone position to eat. ( less energy expenditure) <br />If T.rex did go in a prone position (i.e. on stomach) to eat<br />and he did not have forelimbs, his body would roll side to side as he was ripping at his food from side to side.<br />His forelimbs, though small and had limited movement, would be perfect as stabilizers.<br />We see these use of side stabilizers today on firetrucks when they extend their ladders to reduce the chance of rollover.<br />J. Cipollinanoreply@blogger.comtag:blogger.com,1999:blog-6868618319990879375.post-41350495877461001752013-02-23T03:31:20.058+00:002013-02-23T03:31:20.058+00:00Here's a question, why don't we study the ...Here's a question, why don't we study the direction and type of break that occurred over arms? That would tell us the the opposing force applied to the bone and exact direction in relation to the body the force that was applied to the arm. Think forensics science, every break tells a story of how. This would at least put most if not all current theories to rest. Who knows it could possibly lead to a completely new surprising theory that has never been thought of before now (or even more mystery?). ;-)RandomPasserbynoreply@blogger.comtag:blogger.com,1999:blog-6868618319990879375.post-59187498275989329732013-02-06T19:54:04.886+00:002013-02-06T19:54:04.886+00:00If the T.rex was able to reach his jaw with the fo...If the T.rex was able to reach his jaw with the forelimbs, he maybe could clean up his teethAnonymousnoreply@blogger.comtag:blogger.com,1999:blog-6868618319990879375.post-53751702360466131542012-11-30T03:27:48.312+00:002012-11-30T03:27:48.312+00:00Great read! Thanks!Great read! Thanks!Anonymoushttps://www.blogger.com/profile/06864532968109140726noreply@blogger.comtag:blogger.com,1999:blog-6868618319990879375.post-55202696350628638792012-10-16T22:46:48.981+00:002012-10-16T22:46:48.981+00:00Why is it assumed they were vestigial as in, on th...Why is it assumed they were vestigial as in, on their way out, rather than the precursors to longer arms?<br />The_Laughing_Seraphimhttps://www.blogger.com/profile/06940886721986767773noreply@blogger.comtag:blogger.com,1999:blog-6868618319990879375.post-14256130362235297522012-06-19T15:52:37.307+00:002012-06-19T15:52:37.307+00:00Sent to me via email by Daniel Robillard:
I have a...Sent to me via email by Daniel Robillard:<br />I have always thought T-Rex was a scavenger. Look at the way large scavenging birds such as Vultures feed. They have no need for arms. They have long necks and really dig into the carcass, all the way up to the shoulders. Picture T-Rex feeding like this. I see his arms held tight to the body so he can really dig in deep. Perhaps the long claws aided in pulling out the entrails. This may account for the broken limbs as this was likely a frenzied affair as it is with modern scavenging birds. Some of the other Ideas have merit as limbs are used for a variety of functions. I really think the primary adaptation was for feeding and hauling out guts.Sarda Sahneyhttps://www.blogger.com/profile/15304436221452464387noreply@blogger.comtag:blogger.com,1999:blog-6868618319990879375.post-44287225424196616012012-05-29T04:52:52.842+00:002012-05-29T04:52:52.842+00:00Other suggestions:
Tactile Receptors
Perhaps they ...Other suggestions:<br /><b>Tactile Receptors</b><br />Perhaps they worked much like antennae for an insect providing additional sensory information or even like the tongue of a snake<br /><b>Communication Devices</b><br />Perhaps the claws were used to make clicking noises to communicate with others; a clicking sound would be useful when hunting as the prey may mistake it for background noise rather than communicationAnonymousnoreply@blogger.comtag:blogger.com,1999:blog-6868618319990879375.post-87124616357100869072012-05-15T17:06:31.164+00:002012-05-15T17:06:31.164+00:00Maybe there was flesh & muscle that did not ha...Maybe there was flesh & muscle that did not have bones, like an elephant's trunk. Could they have been cartilage wings used to hide under & capture prey?Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-6868618319990879375.post-35459795374773989422012-02-29T20:40:46.275+00:002012-02-29T20:40:46.275+00:00From all of this, I (only an interested layman) ca...From all of this, I (only an interested layman) can imagine an evolutionary sequence like this: T. Rex starts as a typical quadripedal reptilian creature. It begins to favor running on the hind legs. It begins to favor using the mouth as weapon over the front claws. So it begins to favor leaning forward for additional reach with the mouth.<br /><br />That creates a balance problem, so it develops a heavy counter-balancing tail and less massive forelimbs. Less massive front limbs not only help avoid being front-heavy, but they also make the creature more agile. (It's seizing prey with it neck and mouth like a monitor lizard or snake, except from a biped stance. Long limbs in front are more of an encumbrance when moving quickly through cover than they are an advantage). By shortening the forelimbs, the creature can front reduce mass, and also "clear room" for quick, unimpeded seizing action by the neck and head. <br /><br />But it still has small forelimbs that are useful for boosting itself upright, as meat hooks, for managing its nest. Or if it's a bird-like creature, for some limited grooming of its mate.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-6868618319990879375.post-396551480018954372012-02-10T12:02:39.760+00:002012-02-10T12:02:39.760+00:00What about just regular balance?
I always found it...What about just regular balance?<br />I always found it weird that a two legged creature would be able to keep himself up without the aid of something to give more balance then just head and tail... even if his center of gravity was low..Netzernoreply@blogger.comtag:blogger.com,1999:blog-6868618319990879375.post-27668657858840195422012-01-24T18:12:04.654+00:002012-01-24T18:12:04.654+00:00So a summary of theories:
-Help the dinosaur stand...So a summary of theories:<br />-Help the dinosaur stand up<br />-Balance or aid in sex<br />-Meat hooks while T. rex ate<br />-Counterbalance to running<br />-Parental care - moving eggs around in the nest <br />-Nothing - vestigal body part.<br /><br />Any more ideas? I have heard some creative theories, do you scientist guys have any other ideas that seem credible?Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-6868618319990879375.post-48327839414348211852012-01-15T13:24:52.731+00:002012-01-15T13:24:52.731+00:00The arms were getting in the way in combat against...The arms were getting in the way in combat against other carnivores and chronically maimed and subsequently useless. This further drove the strength development of its neck, head, and feet. We're looking at evolution where the mouth/intake is the focal point for a carnivores survival. Consider the crocodiles and sharks. Apex predators with no need for kitchen utensils.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-6868618319990879375.post-29048678967389470762011-09-09T23:08:23.688+00:002011-09-09T23:08:23.688+00:00What about the possibility that they were actually...What about the possibility that they were actually wing appendages similar to the ones found in today's parrot's. There is research in China to suggest that a T-rex they found may have had feathers. I am not suggesting that t-rex flew. I am thinking more along the lines of an ostrich. What to you think? I can find no theories on this.Kids Cash Connectionhttps://www.blogger.com/profile/12891279643738615327noreply@blogger.comtag:blogger.com,1999:blog-6868618319990879375.post-27696710413799801172010-06-05T19:06:24.967+00:002010-06-05T19:06:24.967+00:00T-Rex's arms being small or not, it makes no d...T-Rex's arms being small or not, it makes no difference, everything has a purpose. The arms were possibly capable of lifting 400lbs? Well I dare say, with that strength and those meat hooks for fingers, the creature could scratch out a divet in the ground for a nest to place its eggs quite nicely, I think.TheLastBoyScouthttps://www.blogger.com/profile/03387285469253302808noreply@blogger.comtag:blogger.com,1999:blog-6868618319990879375.post-43505562031020443412009-10-30T22:55:39.735+00:002009-10-30T22:55:39.735+00:00I have a theory. T-Rex probably used the same stra...I have a theory. T-Rex probably used the same strategy as the Komodo dragon, administering a poison bite, probably using a bacteria in it's saliva to poison the blood of it's prey. Then it would follow the sickened animal until it collapsed. Hence it did not need large fore arms to grapple with it's prey.Unknownhttps://www.blogger.com/profile/16449787377479682773noreply@blogger.comtag:blogger.com,1999:blog-6868618319990879375.post-77589266096801387242009-10-21T02:56:56.952+00:002009-10-21T02:56:56.952+00:00Could the arms be used for picking the teeth?Could the arms be used for picking the teeth?Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-6868618319990879375.post-82034982141966680132009-09-22T04:57:19.350+00:002009-09-22T04:57:19.350+00:00Nesting might be the answer. Surely T-Rex could no...Nesting might be the answer. Surely T-Rex could not see the nest on the ground very well standing upright. T-Rex would probably not handle the eggs with it's powerful jaws or large feet. I think that tending to the nest while squating on it's belly could possible explain the need to have functional smaller arms. This idea coupled with the need to have a proportionate counterbalance and the use of the large head for eating kinda makes sense. While squating the T-Rex can rotate the eggs and police the nest. Still it is amazing that these arms did not change much in over 150,000,000 years. Did'nt they just discover a small fully grown cousin of the T-Rex in China. Wonder how the evolution stacks up with that specimen.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-6868618319990879375.post-80190379505843593282008-12-26T05:47:00.000+00:002008-12-26T05:47:00.000+00:00Evolution? Why not creation? I've heard it being t...Evolution? Why not creation? I've heard it being told that there's an infinite chance that life evolved, but if that were true, why is everything so perfectly made? Ex- the trees, how they work with a water circulation system, going way over 300 feet, without a sound. Alot of things in nature we could not recreate ourselves, and if we did, we could not match up to. The human body, for example. We could not recreate the human eye, to such precision. 1 in a million chance everything worked out so well? And if we were evolved, Woman would have 4 arms instead just two just to look after her children. And a million years have passed already, and I'm not seeing any stubs under my arms yet... From Anonymous, <BR/>03 November 2008 02:35Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-6868618319990879375.post-80953999500099877432008-11-03T02:35:00.000+00:002008-11-03T02:35:00.000+00:00Has anyone concidered that the scientits just migh...Has anyone concidered that the scientits just might have put it together wrong? Most animals are proportinal to their size, maybe someone put the wrong pieces together, is it soo wrong to believe that? Hello?Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-6868618319990879375.post-748796929556429692007-10-18T14:24:00.000+00:002007-10-18T14:24:00.000+00:00People are in general only talking about the arms ...People are in general only talking about the arms of T-rex, but its relatives had like Albertosaurus had also only very small arms. And even those already small arms looks still comparably usefull in contrasts to the tiny, but still four-fingered stumps of Carnotaurus. Perhaps they had still some sort of funtion in tyrannosaurids, but in Carnotaurus they were surely vestigal. <BR/>Interestingly, the re-evolution of clawed arms in phorusrhacids like Titanis walleri has several parallels to T-rex. The arms were in contrast to the complete animal very small, especially compared to the huge head, but they were very strong, although they had only two claws and also a very limited range. They had surely not evolved, if they had not had any function.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-6868618319990879375.post-12027534100685898222007-07-08T06:01:00.000+00:002007-07-08T06:01:00.000+00:00there are people with every frickin kind of intere...there are people with every frickin kind of interest out there.<BR/>thank you so much for letting me in on these facts about dinosaurs.<BR/>im so scared, and hate that i havent chose a path for me yet.Anonymousnoreply@blogger.com