Agriculture
Flush-Free Fertilizer
Growing Healthier Tomato Plants
Middle school science adventures
Amphibians
Toads
Bullfrogs
Salamanders and Newts
Animals
Revenge of the Cowbirds
The Secret Lives of Grizzlies
A Butterfly's New Green Glow
Behavior
Puberty gone wild
Baby Talk
Mind-reading Machine
Birds
Kingfishers
Parakeets
Ospreys
Chemistry and Materials
Sticky Silky Feet
When frog gender flips
The metal detector in your mouth
Computers
Batteries built by Viruses
The Book of Life
Two monkeys see a more colorful world
Dinosaurs and Fossils
Mini T. rex
Winged Insects May Go Way Back
Message in a dinosaur's teeth
E Learning Jamaica
E Learning in Jamaica WIN PRIZES and try our Fun Animated Games
2014 GSAT Results for Jamaican Kids
Results of GSAT are in schools this week
Earth
Science loses out when ice caps melt
Deep History
Coral Gardens
Environment
Whale Watch
Forests as a Tsunami Shield
A 'Book' on Every Living Thing
Finding the Past
Ancient Art on the Rocks
A Long Haul
Chicken of the Sea
Fish
Bull Sharks
Piranha
Catfish
Food and Nutrition
Recipe for Health
Allergies: From Bee Stings to Peanuts
Yummy bugs
GSAT English Rules
Order of Adjectives
Finding Subjects and Verbs
Problems with Prepositions
GSAT Exam Preparation Jamaica
Scotiabank Jamaica Foundation Grade Six Achievement Test (GSAT) Scholarships
The Annual GSAT Scholarships
Ministry of Education Announces 82 GSAT Scholarships for 2010
GSAT Exams Jamaica Scholarships
GSAT Exam Preparation
Results of GSAT are in schools this week
42,000 students will sit for the GSAT Exam in two weeks
GSAT Mathematics
Deep-space dancers
Detecting True Art
GSAT Practice Papers | GSAT Mathematics | Maths
Human Body
Prime Time for Broken Bones
Football Scrapes and Nasty Infections
Remembering Facts and Feelings
Invertebrates
Fleas
Centipedes
Roundworms
Mammals
Chinchillas
Rottweilers
Woolly Mammoths
Parents
Choosing a Preschool: What to Consider
Children and Media
The Surprising Meaning and Benefits of Nursery Rhymes
Physics
One ring around them all
Dreams of Floating in Space
Extra Strings for New Sounds
Plants
Tracking the Sun Improves Plant Pollen
Springing forward
City Trees Beat Country Trees
Reptiles
Crocodilians
Lizards
Caimans
Space and Astronomy
Planning for Mars
Wrong-way planets do gymnastics
Burst Busters
Technology and Engineering
Weaving with Light
Roll-Up Computer Monitors to Go
A Clean Getaway
The Parts of Speech
Problems with Prepositions
What is a Verb?
What is a Preposition?
Transportation
Tinkering With the Basic Bike
Where rivers run uphill
Revving Up Green Machines
Weather
The Best Defense Is a Good Snow Fence
The solar system's biggest junkyard
Earth's Poles in Peril
Add your Article

Mini T. rex

Among dinosaurs, Tyrannosaurus rex may be the most familiar. At 20 feet tall and twice that long from snout to tail, this beast was no doubt a scary sight to any smaller animals that crossed its path. It had a large head, strong legs and tiny arms, and T. rex was one of the fiercest dinosaurs to roam the Earth from about 90 million to 65 million years ago. A newly found dinosaur skeleton, discovered in China, look a lot like the remains of a T. rex. Its head was large, compared to its body, and its strong legs suggest the animal was quick on its feet. Despite these similarities, there’s a very important difference: This new dinosaur, named Raptorex kriegsteini, was quite a bit smaller than T. rex. “We see this all to our great surprise in an animal about the size of a human,” says Paul Sereno, a paleontologist at the University of Chicago who led the study of the dino’s bones. (Paleontologists are scientists who study the remains of animals that lived a long time ago to try to understand more about life on Earth.) Sereno and his team of scientists estimate that it would take about 90 full-grown Raptorex dinosaurs to weigh as much as a T. rex. The scientists were surprised to see so many similarities between the relatively tiny Raptorex and the giant T. rex. In addition to strong legs and a large head, the Raptorex also had specialized feet and tiny arms. The discovery of the Raptorex suggests that paleontologists may have to change the way they think about dinosaur bodies. For example, “It was the common perception that the arms got smaller as the animals grew bigger,” says Sereno. But since the small Raptorex also had tiny arms, that perception may be incorrect—and needs to be studied further. The paleontologists found another important difference between the two types of dinos. The Raptorex dinosaurs probably lived about 125 million years ago, or tens of millions of years before than the first T. rex showed up. This age difference suggests that the evolutionary ancestors of T. rex may also have been fast and fierce—even if they weren’t 20 feet tall. The paleontologists hope these two differences—skeleton size and time periods—will help them learn how the T. rex evolved through natural selection into a fast and ferocious predator. In the case of the evolution of the T. rex, scientists may want to study how, over time, succeeding generations of the dinosaur evolved to be so large, have such strong legs, or have such tiny arms. Thomas Holtz, a paleontologist at the University of Maryland in College Park, says the new discovery suggests that the ancestors of T. rex probably looked a lot like the T. rex most people think of today. But, he points out, “There’s still a gap of a few tens of millions of years” that has to be studied. To learn more about how the T. rex came to be so ferocious, however, they’ll have to find the skeletons of dinosaurs that lived in the time between the age of Raptorex and that of T. rex.

Mini T. rex
Mini T. rex








Designed and Powered by HBJamaica.com™