Agriculture
Making the most of a meal
Middle school science adventures
Growing Healthier Tomato Plants
Amphibians
Salamanders
Tree Frogs
Salamanders and Newts
Animals
A Seabird's Endless Summer
Copybees
Glimpses of a Legendary Woodpecker
Behavior
Mosquito duets
Wake Up, Sleepy Gene
Talking with Hands
Birds
Geese
Mockingbirds
Rheas
Chemistry and Materials
The science of disappearing
Salt secrets
Picture the Smell
Computers
Secrets of an Ancient Computer
Hitting the redo button on evolution
Toxic Dirt + Avian Flu = Science Fair Success
Dinosaurs and Fossils
Dinosaur Eggs-citement
Big Fish in Ancient Waters
Ancient Critter Caught Shedding Its Skin
E Learning Jamaica
E Learning in Jamaica WIN PRIZES and try our Fun Animated Games
Results of GSAT are in schools this week
2014 GSAT Results for Jamaican Kids
Earth
Hints of Life in Ancient Lava
In Antarctica watch the heat (and your step)
Getting the dirt on carbon
Environment
Animal CSI or from Science Lab to Crime Lab
Sea Otters, Kelp, and Killer Whales
Giant snakes invading North America
Finding the Past
Settling the Americas
Words of the Distant Past
Chicken of the Sea
Fish
Saltwater Fish
Hagfish
Basking Sharks
Food and Nutrition
Strong Bones for Life
A Taste for Cheese
The mercury in that tuna
GSAT English Rules
Pronouns
Whoever vs. Whomever
Capitalization Rules
GSAT Exam Preparation Jamaica
The Annual GSAT Scholarships
2014 GSAT Results for Jamaican Kids
Preparing for the GSAT Exam
GSAT Exams Jamaica Scholarships
Access denied - Disabled boy aces GSAT
42,000 students will sit for the GSAT Exam in two weeks
GSAT Practice Papers | GSAT Mathematics | Maths
GSAT Mathematics
10 Common Mistakes When Preparing for the GSAT Math Test
Math is a real brain bender
Math of the World
Human Body
Taking the sting out of scorpion venom
Spit Power
Workouts: Does Stretching Help?
Invertebrates
Mollusks
Lobsters
Caterpillars
Mammals
Giraffes
Domestic Shorthairs
Killer Whales
Parents
Choosing a Preschool: What to Consider
The Surprising Meaning and Benefits of Nursery Rhymes
Expert report highlights the importance to parents of reading to children!
Physics
Project Music
Strange Universe: The Stuff of Darkness
Invisibility Ring
Plants
White fuzzy mold not as friendly as it looks
Tracking the Sun Improves Plant Pollen
A Change in Leaf Color
Reptiles
Turtles
Garter Snakes
Reptiles
Space and Astronomy
Sounds of Titan
Witnessing a Rare Venus Eclipse
A Star's Belt of Dust and Rocks
Technology and Engineering
Drawing Energy out of Wastewater
Musclebots Take Some Steps
Switchable Lenses Improve Vision
The Parts of Speech
What is a Preposition?
What is a Noun
What is a Verb?
Transportation
Robots on a Rocky Road
Troubles with Hubble
Revving Up Green Machines
Weather
Arctic Melt
Catching Some Rays
Weekend Weather Really Is Different
Add your Article

The bug that may have killed a dinosaur

Sue is a famous Tyrannosaurus rex whose skeleton lives in the Field Museum in Chicago. Small, smooth holes in Sue’s jawbones have been a scientific mystery for years, and scientists want to know how they formed. Some researchers have believed, for example, that the holes resulted from a dino-on-dino fight. Scientists may have solved the mystery in Sue’s jaws. A new study suggests that the holes were caused by something much smaller than another dinosaur. In the new study, researchers say the holes may have come from infection by a tiny parasite — and that infection may have killed the mighty dinosaur. A parasite is an organism that cannot live on its own. Instead, it feeds and lives on another organism. In Sue’s case, the guilty parasite is called Trichomonas. Unlike the dinosaurs, which became extinct about 65 million years ago, different kinds Trichomonas still live on the Earth. In the worst cases, a Trichomonas infection can cause tissues to swell and block the throat. It can also cause the jaw to rot — and leave holes in the bones. These symptoms would be bad news for a T. rex with a nasty Trichomonas infection. Unable to swallow food, the dinosaur would eventually die of thirst or starve. “There are some things you can survive,” Ewan Wolff, one of the researchers, told Science News. “But not having a hole in the back of your throat is not one of them.” Today, this parasite often infects such birds as pigeons, turkeys and chickens — and it was a bird that gave Wolff a clue. Wolff is a paleontologist at the University of Wisconsin–Madison. He says the shapes, sizes and locations of the holes in Sue’s jaw are different than what you would expect if the holes had been caused by a dino fight or by another kind of infection. So he and his colleagues started looking for another explanation, and they looked at the bones of modern birds and crocodiles that had various diseases. The scientists caught a break with the skull of an osprey, a fish-eating hawk easily recognized by its dark back and white chest. The osprey had holes in its jaws similar to Sue’s, and the scientists knew that when the bird was alive it was infected with Trichomonas. They started looking at other T. rex skulls and found nine, including Sue’s, with the telltales holes of a Trichomonas infection. “Either this was a fantastic coincidence, or this was a very common disease in T. rex,” Wolff told Science News about the match between the osprey and Sue. Scientists aren’t sure how the T. rex caught the parasite. Perhaps it ate an infected animal. Wolff says the parasite may also have been spread from dino to dino through face-biting or cannibalism. POWER WORDS (adapted from the Yahoo! Kids Dictionary) parasite An organism that grows, feeds and is sheltered on or in a different organism while contributing nothing to the survival of its host paleontologist A scientist who studies the forms of life that existed in prehistoric or geologic times, as represented by the fossils of plants, animals and other organisms infection When a disease-causing microorganism invades and multiplies in a body part or tissue, possibly causing more tissue injury and serious disease. extinct No longer existing or living, usually said of an entire species.

The bug that may have killed a dinosaur
The bug that may have killed a dinosaur








Designed and Powered by HBJamaica.com™