Dinosaurs Definition and 25 Threads

In another well directed chemical analysis of fossils, a research group has indications that some but not all dinosaurs were warm blooded (endothermic), although some (Stegosauri and Triceratops) had apparently reverted to being cold blooded (ectothermic). In addition, it seems that the flying...

( https://www.nationalgeographic.com/magazine/article/dinosaur-nodosaur-fossil-discovery ) 1. Whats your favourite dinosaur? 2. Have you ever found a fossil (dinosaur or otherwise)? 3. Do you have any favourite non-dinosaur extinct creatures? 4. If you could travel back in time to see dinosaurs...

Is de-extinction of dinosaurs theoretically possible? Has any research actually been done into this?

are birds a subset of reptiles and dinosaurs, or are they their own class? traditionally they are considered their own class, has that changed?

I have started writing a fiction book about dinosaurs. The first chapter is about a T rex pack with a mysterious egg in their nest. The pack itself has 1 adult female, 1 adult male, and 3 juveniles. The adult female was about to lay her eggs when she said "Oh my god, there is an egg in our...

My first question on your forum. I just found you last week and have spent a whole lot of time reading. My question: Not actually a question, but a supposition seeking confirmation. Were it possible to travel faster than light, could we "catch" the light from prehistoric Earth and see...

We all know the famous theory that an asteroid hits the Earth and kill the dinosaurs by starting a chain reaction where the dust is all over the atmosphere preventing sunlight to reach plants causing them eventually to die thus causing herbivorous to die thus causing carnivorous to die. But when...

The following summary is derived from my 2003 biology textbook: Biology: concepts and applications, 5th edition, by Cecie Starr, published by Brooks/Cole, Thomson Learning. (I took biology 101 in fall 2004. This is not homework, but rather for my self-study and interest.) Chapter 24...

That sounds pretty obvious. But it wasn't because of the interpretation of evidence. The charcoal / soot required as evidence was not available. In a nutshell. Robertson et al 2013 explain that it was merely a misinterpretation. The charcoal is simply dilluted by the debris from the...

There are a number of factors involved in weight experienced by a particular mass on the surface of the earth. There is of course the Mass of the Earth itself, the variable distribution of heavier elements in the Earth itself, the motion of the ocean mass due to tides etc, the motion of the...

How do we know that gravity did not change very much? We have the such facts? For example - can we measure the gravitational constant in space? Use double stars, in millions of light years, etc. --- Sorry my English is bad.

Before I start, I want to make sure you all realize that I'm completely serious; this isn't a joke. So my mom is religious, and I'm not. Since I'm into science, she likes to try to provide all kinds of "scientific facts" to back up intelligent design, most of which is simply made up or draws...

There was a program on the discovery channel awhile ago about a scientist who made chicken embryos with teeth and a tail. But I can't find anything on how he did it. I think there was something about enzymes. Anybody got info? Can scientists do that kind of thing with the genome yet?

When looking at dinosaurs and how they lived many millions of years ago it is clear that they must have done so under less gravitational pull from earth. But it is possible that Earth's gravity was the same when they roamed the planet but what allowed them to weigh less was that all mass in the...

Hello, I have heard a theory on how the Earth's electric field is presently stronger than it was at the time of the dinosaurs. The theory reasons that larger dinosaurs, like say a Brontasaurus (pardon spelling) were simply too massive in size and weight for their bodies to be held up by their...

Im still in the process of reading Dawkins book, "The God Delusion", in which he invokes the theory of natural selection many times. When people talk about dinosaurs, they often have mental images of something like this: http://www.kokorodinosaurs.com/tricera.jpg...

I have always had this idea but not sure if it is real. I always thought they were so big because there was more o2 in the air, and eventually they reduced o2 levels leading evolution to favor creatures that didn't need so much of it. Is this true?

Right, I don't know if I can put this here, but I will try. I know a asteroid, or something, wiped out the dinosaurs. But how exactly were they wiped out, did it just completely destroy the area they live in or what? Luke.

I just wanted to ask that are all or most carnivorous dinosaurs were fast and agile?

Evolved into a more intelligent dinosaur, obtaining human-like intelligence? And if us humans had suddenly got extinct, which evolutionary lineage do you think would have the best chance of taking our place, obtaining our kind of intelligence and dominating the planet.

What do you guys think of this? http://www.omniology.com/3-Ceramic-Dinos.html

http://news.bbc.co.uk/2/hi/science/nature/4165973.stm Turns out that the stuff I learned as a kid about the only mamals during the time of the Dinosaurs being little mice who scurried away everytime a Dinosaur came along might not be totally true afterall. Just imagine how many...

Most paleontologists, on discovering new species of dinosaurs, give them exceedingly convoluted scientific names. So, it came as a surprise to find an interestingly named dinosaur. The story goes that once, a new species of dinosaur was discovered by a group of paleontologists, but the first...

Would you please tell me when those animals completely got killed ? Can you please give me some links to sites that you think good to start with, where I can read a little about this ? I honestly don't know anything about this, or know if this thread would be right to be placed here...Since I...

http://www.cnn.com/2003/TECH/science/11/03/dinosaurs.oxygen.reut/index.html