how on earth do we know a female trex is bigger than a male?

[T-REX-KNIGHT]

most doccumeneries always says female trexes are bigger and deadlier then a males but how do we know that were just looking at birds. well there are other animals a trex are related to, example alligators males are bigger than females.
so this wat i beleive a males are bigger but females are more aggressive.
why do you think always hear the phrase momma is very angry.
probably an animal that lives alone a female is bigger example snakes
but most animals that lives in packs groups or herds males are bigger since they protect them from rivals maybe like a lion
the only doccumentery i know has a male trex bigger then a female is dinosaur revalution -_-
but i dont know this is my opinion wats yours i like to hear it

[something is lost]

When we look at the bones, there are certain... parts... to a male. (I kmow, I'm incorrect, but someone needed to say that.)

[T-REX-KNIGHT]

引用自 (-D.M-) Godzilla：

When we look at the bones, there are certain... parts... to a male. (I kmow, I'm incorrect, but someone needed to say that.)

lol
actually most people say about dinos is just looking at animals alive today
in monsters ressurected they say spino's head looks like a croc maybe it it has strong jaws too
really it has strong jaws but not that strong -_-

[smallpox]

First of all, a T. Rex and a crocodile are not very closely related. Therefore, it is not a good choice to be basing your ideas off another animal's characteristics.

The reason scientists believe female tyrannosaurs were larger is because they found tyrannosaurs with larger hips than others being larger themselves. The larger hips were to accommodate eggs.

As for the aggression, well, I don't know if I remember how they came to that, but tyrannosaurs are believed to be family/pack hunters, so if your baby in danger from another predator, wouldn't you be pretty angry? I mean, you know, if you were a woman/either gender and had children, you would relate easier, I'm guessing.

引用自 (-D.M-) Godzilla：

When we look at the bones, there are certain... parts... to a male. (I kmow, I'm incorrect, but someone needed to say that.)

Lol.
Yes, someone definitely did need to say that.

[DriftingDingus]

Short answer:

We really don't.

Long answer:

It was first assumed that way due to what Locharsa mentioned. But there's also the possibilities of them being of different age or "breed" if you will. Based on modern relatives, there are hawks with females being larger than males, so it's not impossible.

[T-REX-KNIGHT]

only way to really find out we need DNA i gues we can start with a mumufied edmontosaurus we found but its not a trex but what ever

[Ween13]

I believe that all the information you need can be found in a Discovery Channel documentary: Clash of the Dinosaurs Generations. It is a very good documentary, nothing like the horrible Monsters Resurrected series. Anyway there is information about how we know that females were larger. What Locharsa7 said seems accurate to me.

[T-REX-KNIGHT]

引用自 SHADOWX945ELITE：

I believe that all the information you need can be found in a Discovery Channel documentary: Clash of the Dinosaurs Generations. It is a very good documentary, nothing like the horrible Monsters Resurrected series. Anyway there is information about how we know that females were larger. What Locharsa7 said seems accurate to me.

i did see clash of the dinosaurs its interesting
actually i research some stuff about rex it says there the same size but the females are longer
although i perfer males larger then a female why
i mean how doesa male trex mate a with a female thats larger than him kinda hard dont u think so i beleive needs to be taller in order to be easier

["DCM" REAPER WOLF]

he stands on something like a tree stump or downed log maybe to make him talleror maybe they somehow lyed on there sides

["DCM" REAPER WOLF]

nope nothing in the wikipedia on it lol

[offline forever]

well we can look at sue the t-rex

[T-REX-KNIGHT]

if sue was a dude then wat will we rename him
Stan or something

[Bearcave]

While your opinion is interesting it seems flawed to me. I agree with everything Locharsa7 said. Telling if a dinosaur was male or female pretty much comes down to a few things; comparative anatomy, speculation, and hypothesis. Paleontologists compare anatomy of theropods with that of birds; not reptiles like crocodiles. So comparing the two is apples and oranges. Naturally females need to have bigger hips to carry eggs as well as bare the weight of the male during mating. Its also possible that males could of been taller or longer than females, females just being the bulkier of the two. Plus if females are more agressive than males yet smaller, then wouldn't they just get picked off regardless? Its simply a case of sexual dimorphism, and females being the dominant sex with such an apex predator is highly probable as it seems fairly common with a lot of today's species.

Dinosaur Revolution, while one of my favorites, (absolutely love the characters of the dinosaurs!) is not a good documentary to go off of for theories. They had a lot of inaccuracies and in corrections in it which is one of the reasons it didn't get spectacular ratings. It was really just Walking With Dinosaurs with a Hollywood budget. I'd stick to books.

Basically when it comes to these kind of things its best to keep an open mind to all theories.

ps:

引用自 T-REX OVERLORD 6969：

only way to really find out we need DNA i gues we can start with a mumufied edmontosaurus we found but its not a trex but what ever

That is impossible as DNA has a half-life of 500 or so years, so getting 60+ million year old dna is not going to happen.

[Ween13]

引用自 T-REX OVERLORD 6969：

引用自 SHADOWX945ELITE：

I believe that all the information you need can be found in a Discovery Channel documentary: Clash of the Dinosaurs Generations. It is a very good documentary, nothing like the horrible Monsters Resurrected series. Anyway there is information about how we know that females were larger. What Locharsa7 said seems accurate to me.

i did see clash of the dinosaurs its interesting
actually i research some stuff about rex it says there the same size but the females are longer
although i perfer males larger then a female why
i mean how doesa male trex mate a with a female thats larger than him kinda hard dont u think so i beleive needs to be taller in order to be easier

The male wouldn't need to be taller, the female probably bowed her head down and raised her...um...back...area. And then if you know how babies are made you'll understand how the male would get up there:
https://www.youtube.com/watch?v=kcBKJ9VH37o

[T-REX-KNIGHT]

引用自 SHADOWX945ELITE：

引用自 T-REX OVERLORD 6969：

i did see clash of the dinosaurs its interesting
actually i research some stuff about rex it says there the same size but the females are longer
although i perfer males larger then a female why
i mean how doesa male trex mate a with a female thats larger than him kinda hard dont u think so i beleive needs to be taller in order to be easier

The male wouldn't need to be taller, the female probably bowed her head down and raised her...um...back...area. And then if you know how babies are made you'll understand how the male would get up there:
https://www.youtube.com/watch?v=kcBKJ9VH37o

they got 1 part wrong trexes actually mate fore life forming a family group the adults will kick their offspring wen the thay reach adult hood while the parents still stays together
their children are now old enough to find a family of there own

[Ween13]

引用自 T-REX OVERLORD 6969：

引用自 SHADOWX945ELITE：

The male wouldn't need to be taller, the female probably bowed her head down and raised her...um...back...area. And then if you know how babies are made you'll understand how the male would get up there:
https://www.youtube.com/watch?v=kcBKJ9VH37o

they got 1 part wrong trexes actually mate fore life forming a family group the adults will kick their offspring wen the thay reach adult hood while the parents still stays together
their children are now old enough to find a family of there own

I know, but it explains how they...you know...did it.