Sunday, May 16, 2021
Home Environment Study: 2.5 Billion T. Rex Roamed The Earth, But Not All At...

Study: 2.5 Billion T. Rex Roamed The Earth, But Not All At Once

T. rex roamed North America for about 1.2 million to 3.6 million years, implying that population density was low at any particular time

One Tyrannosaurus rex seems scary enough. Now picture 2.5 billion of them. That’s how many of the fierce dinosaur kings probably roamed Earth over the course of a couple of million years, a new study finds.

Using calculations based on body size, sexual maturity, and the creatures’ energy needs, a team at the University of California, Berkeley figured out just how many T. rex lived over 127,000 generations, according to a study in Thursday’s journal Science. It’s a first-of-its-kind number, but just an estimate with a margin of error that is the size of a T. rex.

“That’s a lot of jaws,” said study lead author Charles Marshall, director of the University of California Museum of Paleontology. “That’s a lot of teeth. That’s a lot of claws.”

Follow NewsGram on Instagram to keep yourself updated.

The species roamed North America for about 1.2 million to 3.6 million years, meaning the T. rex population density was small at any one moment. There would be about two in a place the size of the Washington, D.C., or 3,800 in California, the study said.

T. Rex
Tyrannosaurus rex, The Palace of Discovery, Paris. Wikimedia Commons

“Probably like a lot of people, I literally did a double-take to make sure that my eyes hadn’t deceived me when I first read that 2.5 billion T. rexes have ever lived,” said Macalester College paleobiologist Kristi Curry Rogers, who wasn’t part of the study.

Marshall said the estimate helps scientists figure the preservation rate of T. rex fossils and underscores how lucky the world is to know about them at all. About 100 or so T. rex fossils have been found — 32 of them with enough material to figure they are adults.

If there were 2.5 million T. rex instead of 2.5 billion, we would probably have never known they existed, he said.

Marshall’s team calculated the population by using a general biology rule of thumb that says the bigger the animal, the less dense its population. Then they added estimates of how much energy the carnivorous T. rex needed to stay alive — somewhere between a Komodo dragon and a lion. The more energy required, the less dense the population.

They also factored in that the T. rex reached sexual maturity somewhere around 14 to 17 years old and lived at most 28 years.

ALSO READ: ‘Godzilla’ Shark Discovered In New Mexico Is Given A Formal Name

Given uncertainties in the creatures’ generation length, range, and how long they roamed, the Berkeley team said the total population could be as little as 140 million or as much as 42 billion with 2.4 billion as the middle value.

The science about the biggest land-living carnivores of all time is important, “but the truth, as I see it, is that this kind of thing is just very cool,” said Purdue University geology professor James Farlow. (VOA/KB)

STAY CONNECTED

19,509FansLike
362FollowersFollow
1,773FollowersFollow

Most Popular

Leveraging New Technologies Can Help Protect Families During Covid-19

Families across the world have been under tremendous pressure in the face of the ongoing crisis. Deep-seated gender inequalities and discrimination have ensured that...

Popularization Of Clear Teeth Aligners In India

Traditionally, the orthodontic procedure that seeks to "correct" crooked, overlapping, crowded, and gapped teeth has relied on metal braces. The image of a wired-teethed...

How To Achieve The Feathered Eyebrow Look In 5 Simple steps

The 2021 photo-ready brow look of the year is 'Feathered eyebrows'. Light and fluffy brows that enhance the natural face structure and at the...

Knowing About Mental Health Awareness Week

Mental Health Awareness Week runs from May 10-16 this year. During this pandemic, millions of us have experienced a mental health problem or seen...

Here’s How You Restore Collagen In Your Skin

Collagen is responsible for the irresistible quality, texture, and bounce found in baby skin. Collagen makes up 80 percent of skin and consequently is...

Here’s How You Can Manage Post Vaccine Symptoms From Home

A sore injection site, pain in the injected arm, mild fever, moderate fatigue, headaches, chills, and even diarrhea are symptoms commonly seen after administration...

BJP: Making Fun Of India’s Culture Is Shashi Tharoor’s Favourite Pastime

The BJP slammed former Union Minister and Congress MP Shashi Tharoor for questioning the progress the country made in recent years. The saffron party...

Why In India, Healthcare Delivery Is A Challenge

Recently, it was flashed in the media that people are struggling outside the hospitals to get a bed. Several celebrities have also conveyed that...

Recent Comments