More than a billion T-Rex ruled Earth

[Dalia]

The figure was simply mind-blowing. According to researchers, there were no less than 1.7 billion T-Rex on Earth 65 to 68 million years ago (before the arrival of the famous asteroid Chicxulub).

Estimating the number of individuals of an extinct species is not easy. To achieve this, the scientists had to take into account a large number of parameters, such as the average number of eggs laid, estimated life expectancy and the survival rate of T-Rex.

https://www.science.org/doi/10.1126/science.abc8300

 

[luiza]

Rubbish . There only was one Marc Bolan .

 

[1srelluc]

 

[mamooth]

That 1.7 billion number is the total number of T-rex to ever have existed. The paper says that T-rex population at any given time was about 20,000.

 

[1srelluc]

Now they are petroleum products.....Natural gas = T-Rex fart.

 

[Dalia]

That 1.7 billion number is the total number of T-rex to ever have existed. The paper says that T-rex population at any given time was about 20,000.

That 1.7 billion number is the total number of T-rex to ever have existed. The paper says that T-rex population at any given time was about 20,000.

The title of my thread should have said :

In All of Time, 2.5 Billion Tyrannosaurus Rexes Have Roamed Earth​

In All of Time, 2.5 Billion Tyrannosaurus Rexes Have Roamed Earth

The study used calculations based on body size and metabolism rate to estimate out how many dinosaurs lived throughout the species existence

www.smithsonianmag.com

 

[toobfreak]

The figure was simply mind-blowing. According to researchers, there were no less than 1.7 billion T-Rex on Earth 65 to 68 million years ago

I seriously doubt that estimate. If that were true, every square mile of land on the continents would have had about 30 T-Rexes on it, and I hardly think a square mile could support the feeding of 30 T-Rexes.

 

[Dalia]

I seriously doubt that estimate. If that were true, every square mile of land on the continents would have had about 30 T-Rexes on it, and I hardly think a square mile could support the feeding of 30 T-Rexes.

Yes, it would have taken a lot of prey and these averages imply that a total of 2.5 billion T. rex would have lived across their native North America, from Alaska to Mexico, over a period of about two to three million years..

 

[Flash]

20K alive all over earth at any one time does not sound unreasonable.

 

[WinterBorn]

I seriously doubt that estimate. If that were true, every square mile of land on the continents would have had about 30 T-Rexes on it, and I hardly think a square mile could support the feeding of 30 T-Rexes.

Only if you expected all the Tyrannosaurs lived at the same time. They estimate there were roughly 127,000 generations of the T-Rex.

 

[TroglocratsRdumb]

 

[TroglocratsRdumb]

 

[TroglocratsRdumb]

 

[jwoodie]

The title of my thread should have said :

In All of Time, 2.5 Billion Tyrannosaurus Rexes Have Roamed Earth​

In All of Time, 2.5 Billion Tyrannosaurus Rexes Have Roamed Earth

The study used calculations based on body size and metabolism rate to estimate out how many dinosaurs lived throughout the species existence

www.smithsonianmag.com

20,000 at any given time.

 

[Captain Caveman]

The figure was simply mind-blowing. According to researchers, there were no less than 1.7 billion T-Rex on Earth 65 to 68 million years ago (before the arrival of the famous asteroid Chicxulub).

Estimating the number of individuals of an extinct species is not easy. To achieve this, the scientists had to take into account a large number of parameters, such as the average number of eggs laid, estimated life expectancy and the survival rate of T-Rex.View attachment 801907

https://www.science.org/doi/10.1126/science.abc8300

And they were thriving in co2 levels of 2,400+ ppm, yet we're allegedly dying out if it gets more than 420ppm.

What's their secret, humanity needs to learn it quickly.

 

[beautress]

Now they are petroleum products.....Natural gas = T-Rex fart.

Actually, Petroleum products do not come from T-Rex anything. They come from plants, exclusively:

• • The popular idea that oil, gas, and coal are made of dead dinosaurs is mistaken. Fossil fuels consist mainly of dead plants – coal from trees, and natural gas and oil from algae, a kind of water plant.
  earthsky.org › human-world › is-my-cars-fuel-made-of-dead-dinosaurs
  
  

  | EarthSky

  earthsky.org
  
  
  
  
  
  

 

[Dalia]

More information about T-Rex :

How long did a T. rex live?​

Video: How long did T. rex live? | AMNH

Find out how old the oldest known T. rex was when it died and what evidence paleontologists use to determine dinosaur lifespan.

www.amnh.org

 

[Hellbilly]

 

[ReinyDays]

Wait a minute .. if the species is extinct then the population would be ... ummm ...
... zero ...
... right? ...

 

[norwegen]

Wait a minute .. if the species is extinct then the population would be ... ummm ...
... zero ...
... right? ...

Right.