Visual Comparisons Thread

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Visual Comparisons Thread
Tweet Topic Started: Jan 7 2012, 01:17 AM (507,212 Views)
Ausar	Jun 11 2016, 05:16 AM Post #1426
*Xi-miqa-can! Xi-miqa-can! Xi-miqa-can!* Posts: 8,781 Group: Members Member #771 Joined: Oct 31, 2012	You really get a sense of how large that tiger is when it attempts to apprehend the woman (obviously to fail with the glass between them).



Taipan	Jun 11 2016, 01:28 PM Post #1427
Administrator Posts: 18,011 Group: Admins Member #1 Joined: Feb 25, 2011	Brown Bear / Sperm Whale A brown bear explores a sizable meal — a sperm whale carcass that washed up in southeastern Alaska. Credit: Karyn Traphagen A meal this rich needs to be appreciated from every angle. Credit: Karyn Traphagen A brown bear atop the decaying sperm whale. Credit: Karyn Traphagen http://www.livescience.com/55043-bear-eats-whale.html Mammal Urination Mean Volume & Duration Many urological studies rely upon animal models such as rats and pigs whose urination physics and correlation to humans are poorly understood. Here we elucidate the hydrodynamics of urination across five orders of magnitude in animal mass. Using high-speed videography and flow rate measurement at Zoo Atlanta, we discover the "Law of Urination," which states animals empty their bladders over nearly constant duration of average 21 seconds (standard deviation 13 seconds). This feat is made possible by larger animals having longer urethras, thus higher gravitational force and flow speed. Smaller mammals are challenged during urination due to high viscous and surface tension forces that limit their urine to single drops. Our findings reveal the urethra constitutes as a flow enhancing device, enabling the urinary system to be scaled up without compromising its function. This study may help in the diagnosis of urinary problems in animals and in inspiring the design of scalable hydrodynamic systems based on those in nature. Study : Law of Urination: all mammals empty their bladders over the same duration Edited by Taipan, Jun 11 2016, 10:47 PM.



Thalassophoneus	Jun 12 2016, 01:45 AM Post #1428
Pelagic Killer Posts: 5,930 Group: Members Member #2,617 Joined: Jun 27, 2014	I wonder what is the bear thinking! Seeing those giant teeth and this jaw as long as itself! It must be like "where did this come from?".



Carcharadon	Jun 14 2016, 05:30 AM Post #1429
*Shark Toothed Reptile* Posts: 4,958 Group: Members Member #419 Joined: Jul 1, 2012	Gaboon viper and puff adder.



DinosaurMichael	Jun 14 2016, 07:47 AM Post #1430
Apex Predator Posts: 6,985 Group: Members Member #5 Joined: Jan 6, 2012	With all that meat for that Bear. It could go without years having to hunt. Damn.



The All-seeing Night	Jun 16 2016, 07:01 AM Post #1431
You are without honor Posts: 3,573 Group: Members Member #1,721 Joined: Sep 28, 2013	Orangutan v boar Edited by The All-seeing Night, Jun 16 2016, 07:06 AM.



blaze	Jun 16 2016, 12:12 PM Post #1432
Carnivore Posts: 2,521 Group: Members Member #365 Joined: Jun 9, 2012	Taipan May 11 2016, 10:19 AM blaze May 5 2016, 05:33 PM Ausar Apr 23 2016, 09:12 PM Could someone make an accurate comparison of the skulls of a grey wolf, spotted hyena, cougar, and Deinonychus? I'd like to see all four of them together. Hi Blaze, just for clarification, please can you list the skull lengths for the 4 species appearing in the above comparison, and please state whether you are using the largest known speciemens, lengths you feel are average, or have you just used random skulls. That way we can determine whether the above visual is representative or misleading. Thanks. No problem, my intention was to show average adult specimens of the largest sex for the mammals, I don't remember the measurements of the actual skulls but they are explicitly labeled as adults in Digimorph.org. The wolf was scaled to a condylobasal length of 244mm, the asymptotic size for male grey artic wolves according to Larter et al. (2012). The cougar is 217mm in greatest length, from a >3 year old male captured in the Yukon described by Jung and Merchant (2005), other measurements from the specimen were head-body length of 140cm and total length of 223cm. The case of the spotted hyena is a little more complicated, it's 228mm in condylobasal length which I got from Kurten (1956) (not "Hamilton et al. 1985", I don't know why I wrote that) but I have come to realize that the measurement he provided is not condylobasal length but something shorter, combining data from Hamilton et al. (1985) and Matthew (1929) I estimate the average condylobasal length of an adult female spotted hyena at 235mm. As how large do they get? the largest wolf in the sample from Larter et al. (2012) had a condylobasal length of ~266mm while the largest spotted hyena from the sample of Matthew (1929) had a condylobasal length of 247mm, though he mentions museum specimens up to 260mm. As for the cougar, the Boone and Crockett Club has their record cougar at 243mm in greatest length (condylobasal length of ~215mm).



Ceratodromeus	Jun 17 2016, 11:50 AM Post #1433
Aspiring herpetologist Posts: 7,449 Group: Members Member #2,105 Joined: Jan 21, 2014	Anaconda & tortoise



Ausar	Jun 17 2016, 12:19 PM Post #1434
*Xi-miqa-can! Xi-miqa-can! Xi-miqa-can!* Posts: 8,781 Group: Members Member #771 Joined: Oct 31, 2012	Maximum adult Anatosaurus (apparently not Edmontosaurus) and Tyrannosaurus link The vast majority of these Hell Creek hadrosaurids were ~8.5m long, but they were only about half grown. Jesus Christ... Edited by Ausar, Jun 17 2016, 12:19 PM.



benko2015	Jun 17 2016, 11:10 PM Post #1435
Autotrophic Organism Posts: 90 Group: Members Member #4,055 Joined: May 20, 2016	Basilosaurus and tylosaurus.



Spartan	Jun 17 2016, 11:40 PM Post #1436
Kleptoparasite Posts: 1,948 Group: Members Member #2,550 Joined: Jun 4, 2014	Ausar Jun 17 2016, 12:19 PM Maximum adult Anatosaurus (apparently not Edmontosaurus) and Tyrannosaurus link The vast majority of these Hell Creek hadrosaurids were ~8.5m long, but they were only about half grown. Jesus Christ... That thing seems far bigger than the 15m stated in the text. The T. rex is roughly 3m at the hips if the human is around 1.8m. That would make this Anatosaurus over 18m long. If the T. rex is Sue even almost 21m.



Ausar	Jun 17 2016, 11:49 PM Post #1437
*Xi-miqa-can! Xi-miqa-can! Xi-miqa-can!* Posts: 8,781 Group: Members Member #771 Joined: Oct 31, 2012	Someone else on another site pointed this out too. One guy thought that maybe the Tyrannosaurus wasn't fully grown, but then that would make this a misleading comparison that defeats the presumed purpose. Edited by Ausar, Jun 17 2016, 11:53 PM.



Spartan	Jun 18 2016, 12:06 AM Post #1438
Kleptoparasite Posts: 1,948 Group: Members Member #2,550 Joined: Jun 4, 2014	http://paleop.deviantart.com/art/Really-Big-Edmontosaurus-march-2-587059302 MOR 1142 seems to suggest an animal in the 14-15m size range. If it were 15m long in the picture the T. Rex would be barely 9m long while the man would stand short of 1.5m. Seems they just oversized it.



benko2015	Jun 19 2016, 04:54 PM Post #1439
Autotrophic Organism Posts: 90 Group: Members Member #4,055 Joined: May 20, 2016	Specatacled caiman and smooth-fronted caiman. Specatacled caiman, Cuvier's dwarf caiman, black caiman and smooth-fronted caiman. Black caiman and spectacled caiman.



Grimace	Jun 20 2016, 07:37 AM Post #1440
Kleptoparasite Posts: 2,288 Group: Members Member #2,170 Joined: Feb 11, 2014



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