Agriculture
Earth-Friendly Fabrics
Watching out for vultures
Growing Healthier Tomato Plants
Amphibians
Salamanders
Newts
Bullfrogs
Animals
Glimpses of a Legendary Woodpecker
The Littlest Lemurs
Sleepless at Sea
Behavior
A Grim Future for Some Killer Whales
Honeybees do the wave
Bringing fish back up to size
Birds
Ospreys
Parakeets
Turkeys
Chemistry and Materials
The Buzz about Caffeine
Heaviest named element is official
The science of disappearing
Computers
The hungry blob at the edge of the universe
New eyes to scan the skies
Play for Science
Dinosaurs and Fossils
Meet the new dinos
Dinosaur Eggs-citement
Fingerprinting Fossils
E Learning Jamaica
Results of GSAT are in schools this week
2014 GSAT Results for Jamaican Kids
E Learning in Jamaica WIN PRIZES and try our Fun Animated Games
Earth
Giving Sharks Safe Homes
Challenging the Forces of Nature
Wave of Destruction
Environment
Will Climate Change Depose Monarchs?
Toxic Cleanups Get a Microbe Boost
Nanosponges Soak Up Pollutants
Finding the Past
Traces of Ancient Campfires
Stone Tablet May Solve Maya Mystery
Watching deep-space fireworks
Fish
Basking Sharks
Megamouth Sharks
White Tip Sharks
Food and Nutrition
Chew for Health
Making good, brown fat
Building a Food Pyramid
GSAT English Rules
Order of Adjectives
Adjectives and Adverbs
Pronouns
GSAT Exam Preparation Jamaica
Preparing for the GSAT Exam
The Annual GSAT Scholarships
Tarrant High overcoming the odds
GSAT Exams Jamaica Scholarships
GSAT Exam Preparation
42,000 students will sit for the GSAT Exam in two weeks
GSAT stars reap scholarship glory
GSAT Mathematics
E Learning in Jamaica WIN PRIZES and try our Fun Animated Games
Monkeys Count
How to Slice a Cake Fairly
Human Body
A Long Trek to Asia
Spitting Up Blobs to Get Around
Attacking Asthma
Invertebrates
Mussels
Worms
Lobsters
Mammals
Bulldogs
Weasels and Kin
Cocker Spaniels
Parents
Choosing a Preschool: What to Consider
What Not to Say to Emerging Readers
Raise a Lifelong Reader by Reading Aloud
Physics
Strange Universe: The Stuff of Darkness
Extra Strings for New Sounds
Einstein's Skateboard
Plants
The algae invasion
Underwater Jungles
A Giant Flower's New Family
Reptiles
Crocodilians
Snakes
Crocodiles
Space and Astronomy
Ringing Saturn
Planning for Mars
Cool as a Jupiter
Technology and Engineering
Sugar Power for Cell Phones
Space Umbrellas to Shield Earth
Musclebots Take Some Steps
The Parts of Speech
What is a Verb?
Countable and Uncountable Nouns
What is a Noun
Transportation
Robots on the Road, Again
Tinkering With the Basic Bike
Troubles with Hubble
Weather
The solar system's biggest junkyard
Weekend Weather Really Is Different
Catching Some Rays
Add your Article

Message in a dinosaur's teeth

Spinosaurs were large, meat-eating dinosaurs whose fossilized remains are often found in the same areas as the bones of tyrannosaurs (such as Tyrannosaurus rex). Fans of the movie Jurassic Park III may remember the spinosaur as the cranky dinosaur — the one with a sail-shaped fin on its back — that destroyed an airplane, ate a few people and took down a T. rex. Paleontologists have wondered how such giants as spinosaurs and tyrannosaurs, both meat-eating and ferocious, could live in the same place while competing for food. In a recent study, a French researcher named Romain Amiot may have found the answer. Amiot, from the University of Lyon 1 in Villeurbanne, France, thinks that spinosaurs may have spent parts of their days in the water, thus avoiding clashes with tyrannosaurs, which lived on the land.This study isn’t the first one in which scientists have suggested spinosaurs spent time in the water. The creatures’ fossilized skeletons show they had long snouts, the way crocodiles do, and studies of spinosaur fossilized stomachs show that the creatures ate fish. But spinosaur skeletons don’t show adaptations to living in the water or swimming — they don’t have specialized feet, for example. In this case, however, the bones didn’t tell the whole story. For Amiot and his team, it was the dino teeth that did the talking. Spinosaur teeth are smooth and shaped liked cones — more like those of modern crocodiles than of tyrannosaurs. An analysis of the chemical makeup of the teeth turned up even more evidence. In particular, the researchers studied oxygen. At its center, an atom contains a nucleus, and the nucleus of an oxygen atom usually contains eight protons and eight neutrons. (Protons and neutrons are the particles in the nucleus of every atom.) But some kinds of oxygen are heavier — most of its atoms may each have 10 neutrons, instead of eight, for example. When an oxygen atom has 10 neutrons, or 18 total particles in its nucleus, it is called oxygen-18. In general, when an atom has a different number of neutrons in its nucleus, it is called an isotope. Oxygen-18 is an oxygen isotope. Animals that live in the water, such as hippos and crocodiles, have different proportions of oxygen and oxygen-18 in their bones and teeth than animals that live on land. Amiot and his team looked at the proportions of oxygen isotopes in the fossilized spinosaur teeth. Comparing these ratios to those found in fossilized teeth and bones from other animals of the spinosaurs’ day, the researchers found a closer resemblance to water animals such as crocodiles and turtles than to land animals such as tyrannosaurs. This analysis shows that spinosaurs probably spent part of their lives in lakes and rivers. This may solve the riddle of the grumpy neighbors: If spinosaurs lived and fed in the water, then they wouldn’t be competing with tyrannosaurs on the land. (And if the spinosaur had simply stayed in the water in Jurassic Park III, the plane would have been okay, the people could have left, and the movie would have been a lot shorter.) The study may “solve the big ecological problem of how spinosaurs could live in the same areas as tyrannosaurs,” Amiot told Science News. “They were avoiding competition for food and territory by dividing up the ecosystem.”

Message in a dinosaur's teeth
Message in a dinosaur's teeth








Designed and Powered by HBJamaica.com™