Episode #125 of the Stack Overflow podcast is here. We talk Tilde Club and mechanical keyboards. Listen now

Questions tagged [dinosaurs]

The tag has no usage guidance.

Filter by
Sorted by
Tagged with
2
votes
1answer
45 views

How does taxonomy work? The case of the Avian Dinosaurs

I recently discovered that the class Aves (or Birds) has been renamed Avian Dinosaurs. My question is when this taxonomic denomination achieved the consensus of the scientific community and through ...
3
votes
1answer
46 views

Oldest Triceratops fossil

In most books, Triceratops is listed to live between 68-66 MYA (million years ago), however some books list Triceratops as living between 70-66 MYA. The Campanian age ended about 72 MYA and then came ...
3
votes
0answers
75 views

Dinosaur bones found

I found a bone in 120 metres under the ground which has nuclear radiation. Can you help me to recognize this bone? It was found in a clay quarry near Odessa Ukraine.
1
vote
1answer
37 views

What sauropod genera had a double row of chevron bones in the tail?

I know that Diplodocus is marked by the feature of having a double row of or "double-beamed" chevron bones in the tail, but how diagnostic is this feature if several other sauropods have it? I mean, ...
0
votes
0answers
12 views

Stenothermal Exhalation: Warm or Cold?

The answer might be obvious, but I've wondered if stenotherms like a common house gecko, for instance, might produce sufficient respiratory heat to exhale warm air. Clearly, respiratory heat and ...
3
votes
1answer
88 views

The phylogenetic definition of the clade Dinosauria

Up until two years ago the clade of Dinosauria was defined as all the descendants of the most recent common ancestor of Triceratops and birds. From Wikipedia: Under phylogenetic nomenclature, ...
1
vote
2answers
179 views

Has evolution made a mistake with prehistoric animals?

Let me start this by saying I have very limited knowledge in biology and evolution. However, when visiting museums and watching documentary movies, I always get impression dinosaurs (and other ...
3
votes
3answers
99 views

Why are there few tetrapod dinosaur carnivores?

Today, most big carnivores are quadrupeds. Bears, Tigers, wolves. During the Jurassic and the Cretaceous, carnivores were mostly bipedal, dinosaurs mostly from the Therapod family. Why was ...
1
vote
0answers
63 views

The size of the Triceratops specimen Lane in the Houston Museum of Natural Science

In 2012 the Houston Museum of Natural Science published they discovered an almost complete fossil of Triceratops including fossilized skin, see HMNS post, and nicknamed it "Lane". I am interested to ...
-1
votes
1answer
51 views

Could an 150 pound human have flown on the back of some species of pterodactyl (assuming they still existed)? [closed]

I'm curious if any type of flying animal that ever existed would have been able to carry your average 150 pound man.
1
vote
1answer
44 views

What is this row of pits along the “upper lip” of theropod skulls?

Consider the row of pits visible in the "upper lip" area (and to some extent, the "lower lip" too) of this T-Rex skull at the Palais de la Découverte, Paris (picture from Wikipedia): I noticed ...
-3
votes
1answer
174 views

Could we back-breed birds into dinosaurs? [closed]

Do some species of birds have dinosaur DNA? Seeing as how birds evolved from dinosaurs. I presume this isn't possible as I haven't seen anything else about it on the internet but it's interesting to ...
0
votes
0answers
242 views

Bite Force of Triceratops

Estimations (or measurements) of bite force is usually conducted for toothy predators like sharks, theropod dinosaurs and crocodiles. For example: Tyrannosaurus had a bite force of about 57 kN (about ...
2
votes
2answers
120 views

Are Triceratops and Eotriceratops similar enough to be considered as the same genus?

Everybody knows Triceratops, the horned dinosaur from Late Cretaceous North America, who lived 68-66 MYA. In 2007, Eotriceratops xerinsularis was named and described (Wikipedia). It lived in (what is ...
1
vote
1answer
134 views

Size of Mamenchisaurus sinocanadorum

In most books the size of long-necked sauropod Mamenchisaurus is stated as about 26 meters. Recently, a huge specimen of Mamenchisaurus sinocanadorum was discovered. However, Gregory S. Paul ...
1
vote
0answers
43 views

Resources for the study of the environment of Laramidia in the Late Cretaceous

I'm looking for resources (book, web, article, etc.) to learn in detail about the environment of Laramidia in the late Cretaceous, including flora, fauna, landscape, and climate. My goal is to get a ...
3
votes
3answers
677 views

Were there any marine/aquatic dinosaurs?

Most dinosaurs were terrestrial, but there were a couple of groups of arboreal and flying dinosaurs (microraptors, birds etc). I have read that the theory that Brachiosaurids were aquatic has been ...
13
votes
3answers
3k views

How compelling is the hypothesis that dinosaurs were killed by toxic plants?

A friend of mine has recently told me that dinosaurs were "killed by flowers". I was a bit surprised and so I googled. And I did find a lot of recent articles in popular media on this topic, probably ...
1
vote
1answer
110 views

Size of Apatosaurus

What are the current and up-to-date estimates of the size of the big sauropod dinosaur Apatosaurus (the biggest species of it) in terms of mass range (weight) and total length? I prefer the answer in ...
3
votes
1answer
131 views

Is this a real dinosaur species?

I recently got and would like to know if this is a real species. It doesn’t look quite like a Styracosaurus, but is close. Can someone identify?
3
votes
1answer
286 views

How can paleontologists identify morphologically different fossils as members of the same species?

I recently saw a documentary about Tyrannosaurus rex, which detailed the growth stages of the dinosaur. Apparently, it underwent a huge growth spurt at around 14 years of age, growing into the massive ...
1
vote
2answers
68 views

What dinosaurs live during cretaceous period?

I cant find website that shows all dinosaurs that lived during this time? Tyrannosaur rex and triceratops I know but what else?
7
votes
1answer
531 views

How didn't large, highly active dinosaurs overheat?

The cube-square law seems to be the deciding factor when it comes to biological heat management. Small organisms with large surface areas relative to their volumes, like mice, need fast heartbeats and ...
5
votes
1answer
126 views

Has the most recent common ancestor of all living birds lived after dinosaur mass extinction?

I wonder if one or more phylogenetic threads of dinosaurs survived the mass extinction. In other words, are all living birds equally related to any given ancient dinosaur, or do some birds relate ...
2
votes
1answer
65 views

Species of dinosaur with longest fossile record (no birds!)

There were many species of dinosaurs and many got extinct long before the whole clade disappeared. I am wondering which species has shown the longest fossile record. Since birds descend from dinosaurs,...
1
vote
2answers
366 views

How is the first Triceratops born?

To clarify at first, I have very little knowledge in biology and paleontology so there might be very obvious things I overlook. According to the evolution theory, there must be a graduate evolution ...
4
votes
2answers
213 views

Evolution of dinosaurs

What did dinosaurs evolve from? Was it the reptiles that evolved from amphibians? I have been researching this but am very confused with who their direct predecessor was. Amphibians evolved from fish.....
1
vote
0answers
75 views

What evidence do we have that dinosaurs were mesotherms?

They went extinct millions of years ago, so what is the evidence supporting the claim that they were mesotherms? And are there any examples of modern-day mesotherms?
2
votes
1answer
104 views

Is it possible that nearly human mammals existed before the last mass extinction dinosaurs?

From time to time I am hearing people discussing about the possibility that men and dinosaurs meeting some time ago. The oldest mammal remains seem to be about 35 million years old, quite some time ...
2
votes
1answer
62 views

Can you see the coloration of Sinosauropteryx with the naked eye?

In 2010 this beautiful fossil of Sinosauropteryx was put under microscopic examination in order to determine the colors of the preserved melanosomes. It was determined that the feathers were reddish ...
20
votes
1answer
3k views

How did the largest/longest dinosaurs hold their head and necks up?

After seeing the images in the articles shown below, I am having a tough time understanding the mechanics of how these incredibly long and heavy necks can be supported outstretched like this. A rigid ...
9
votes
2answers
142 views

How did giant sauropods satisfy their daily energy needs, considering their relatively small mouths?

Gigantic sauropod dinosaurs had relatively small heads (and consequently small mouths) in comparison to their overall body mass. In the book "Dinosaur Odyssey: Fossil Threads in the Web of Life" (by ...
-4
votes
1answer
186 views

Wasn't extinction of dinosaurs necessary? [closed]

Beginning from the triassic era, dinosaurs crawled for millions of years. So my basic idea is, that had the dinosaurs not been wiped out, they would have eaten all the flora on the planet then. ...
2
votes
3answers
215 views

Any simulations of four-winged dinosaur flight? (microraptors)

This week's podcast of the BBC's Science in Action includes a section by Rory Galloway (12:20 to 18:30) covering the Dinosaurs ...
31
votes
4answers
5k views

Were there any flying dinosaurs?

I've seen some articles which came in contradiction with each other. The first article was talking about flying dinosaurs, dinosaurs with feathers and so on. A couple of other articles are talking ...