Agriculture
Silk’s superpowers
Flush-Free Fertilizer
Keeping Bugs Away from Food
Amphibians
Salamanders
Poison Dart Frogs
Frogs and Toads
Animals
Staying Away from Sick Lobsters
Sea Lilies on the Run
A Meal Plan for Birds
Behavior
Double take
Why Cats Nap and Whales Snooze
Listen and Learn
Birds
Dodos
Chicken
Cardinals
Chemistry and Materials
Cooking Up Superhard Diamonds
Earth from the inside out
A Framework for Growing Bone
Computers
New eyes to scan the skies
A Light Delay
Toxic Dirt + Avian Flu = Science Fair Success
Dinosaurs and Fossils
Meet the new dinos
Big Fish in Ancient Waters
Downsized Dinosaurs
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
Polar Ice Feels the Heat
Science loses out when ice caps melt
Warmest Year on Record
Environment
A Vulture's Hidden Enemy
Little Bits of Trouble
Forests as a Tsunami Shield
Finding the Past
Big Woman of the Distant Past
A Long Trek to Asia
Stone Tablet May Solve Maya Mystery
Fish
Barracudas
Nurse Sharks
Flashlight Fishes
Food and Nutrition
Chocolate Rules
Symbols from the Stone Age
Building a Food Pyramid
GSAT English Rules
Who vs. Whom
Problems with Prepositions
Order of Adjectives
GSAT Exam Preparation Jamaica
2014 GSAT Results for Jamaican Kids
Mastering The GSAT Exam
Preparing for the GSAT Exam
GSAT Exams Jamaica Scholarships
GSAT Exam Preparation
GSAT Scholarship
GSAT Practice Papers | GSAT Mathematics | Maths
GSAT Mathematics
How to Slice a Cake Fairly
Prime Time for Cicadas
Play for Science
Human Body
Surviving Olympic Heat
A New Touch
A Better Flu Shot
Invertebrates
Flatworms
Sea Urchin
Moths
Mammals
Hoofed Mammals
Weasels
Ponies
Parents
Raise a Lifelong Reader by Reading Aloud
What Not to Say to Emerging Readers
Children and Media
Physics
Road Bumps
One ring around them all
IceCube Science
Plants
Getting the dirt on carbon
Nature's Alphabet
Springing forward
Reptiles
Crocodiles
Garter Snakes
Asp
Space and Astronomy
Roving the Red Planet
A Very Distant Planet Says "Cheese"
A Planet from the Early Universe
Technology and Engineering
Machine Copy
Weaving with Light
Reach for the Sky
The Parts of Speech
Pronouns
Problems with Prepositions
Countable and Uncountable Nouns
Transportation
Charged cars that would charge
Revving Up Green Machines
Middle school science adventures
Weather
Polar Ice Feels the Heat
In Antarctica watch the heat (and your step)
Science loses out when ice caps melt
Add your Article

Some Dinos Dined on Grass

When dinosaur poop is preserved, it's like a time capsule. The fossilized lumps contain clues about what the reptiles were eating long ago. Recent analyses of fossilized dino droppings unearthed in India have turned up at least five types of grasses. The discovery is thrilling to paleontologists because it's the first evidence that some dinosaurs actually ate grass. The remains also suggest that grass had evolved into different types much earlier than scientists had thought. Titanosaurs probably produced the fossilized poop pellets 65 million years ago. Each piece of fossilized dung, called a coprolite, was shaped like a sphere and measured up to 10 centimeters (4 inches) across. When the researchers looked closely at the coprolites, they were able to identify tiny fragments of glass called phytoliths. These little bits of silica form inside the cells of many plants, and they are especially common in grasses. Each type of grass produces its own uniquely shaped phytolith. So, by analyzing phytoliths left behind in the dino excrement, the scientists were able to identify a variety of grasses that had passed through the digestive tracts of the animals. They also found evidence of other plants, including palm trees, conifers, and cycads. Until now, the earliest known fossils of grass leaves and stems dated back just 56 million years. The new find pushes the date when grasses were flourishing back at least 9 million years, probably more. The research could "completely revise what we've thought about the origin of grasses," says Elizabeth A. Kellogg. She's an evolutionary biologist at the University of Missouri-St. Louis. "This isn't that much older than the oldest previous grass fossils, but to find such diversity at that time is surprising." Other evidence suggests grasses could have first appeared as far back as 80 million years ago. Knowing that grasses arose so early might help explain a long-standing animal mystery. Just before the dinosaurs died out about 65 million years ago, mammals called gondwanatheres appeared on Earth. Gondwanatheres were as big as groundhogs with long, flat teeth. Their teeth were similar to those of horses and other modern grass-eaters. Scientists have been puzzling about what these animals ate. Now they know that it might have been grass.—E. Sohn

Some Dinos Dined on Grass
Some Dinos Dined on Grass








Designed and Powered by HBJamaica.com™