Agriculture
Protecting Cows—and People—from a Deadly Disease
Seeds of the Future
New Gene Fights Potato Blight
Amphibians
Frogs and Toads
Poison Dart Frogs
Newts
Animals
Big Squid
Crocodile Hearts
Armadillo
Behavior
Face values
Mice sense each other's fear
World’s largest lizard is venomous too
Birds
Carnivorous Birds
Pheasants
Cranes
Chemistry and Materials
Big Machine Reveals Small Worlds
Supersonic Splash
The science of disappearing
Computers
Supersonic Splash
Galaxies far, far, far away
The Book of Life
Dinosaurs and Fossils
Some Dinos Dined on Grass
Ancient Critter Caught Shedding Its Skin
Winged Insects May Go Way Back
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
A Grim Future for Some Killer Whales
A Great Quake Coming?
Shrinking Glaciers
Environment
Plastic Meals for Seals
Sounds and Silence
Will Climate Change Depose Monarchs?
Finding the Past
A Volcano's Deadly Ash
The Taming of the Cat
Childhood's Long History
Fish
Swordfish
Goldfish
Sturgeons
Food and Nutrition
A Pepper Part that Burns Fat
Turning to Sweets, Fats to Calm the Brain
How Super Are Superfruits?
GSAT English Rules
Capitalization Rules
Finding Subjects and Verbs
Adjectives and Adverbs
GSAT Exam Preparation Jamaica
GSAT Exam Preparation
GSAT stars reap scholarship glory
Preparing for the GSAT Exam
GSAT Exams Jamaica Scholarships
Results of GSAT are in schools this week
2014 GSAT Results for Jamaican Kids
42,000 students will sit for the GSAT Exam in two weeks
GSAT Mathematics
GSAT Mathematics Quiz, Teaching Math, teaching anxiety
Play for Science
How a Venus Flytrap Snaps Shut
Human Body
Taste Messenger
Speedy Gene Gives Runners a Boost
Football Scrapes and Nasty Infections
Invertebrates
Shrimps
Krill
Wasps
Mammals
Hamsters
Pekingese
Primates
Parents
Children and Media
How children learn
Choosing a Preschool: What to Consider
Physics
One ring around them all
Spin, Splat, and Scramble
IceCube Science
Plants
Stalking Plants by Scent
Fastest Plant on Earth
A Change in Leaf Color
Reptiles
Crocodilians
Black Mamba
Snapping Turtles
Space and Astronomy
Cool as a Jupiter
Solving a Sedna Mystery
Unveiling Titan
Technology and Engineering
Supersuits for Superheroes
Weaving with Light
Drawing Energy out of Wastewater
The Parts of Speech
Pronouns
Adjectives and Adverbs
What is a Verb?
Transportation
Where rivers run uphill
Flying the Hyper Skies
Reach for the Sky
Weather
Earth's Poles in Peril
Science loses out when ice caps melt
Watering the Air
Add your Article

Killer Space Rock Snuffed Out Ancient Life

Long before dinosaurs ever lived, Earth suffered a major catastrophe that wiped out most life on the planet. About 250 million years ago, 95 percent of species in the oceans died out, along with 70 percent of species on land. New research may help explain what happened. Scientists are already pretty sure that a huge meteor wiped out dinosaurs 65 million years ago. There's some evidence from China, Japan, and other places suggesting that a similar impact may have occurred 250 million years ago. The newest evidence comes from Antarctica. Researchers at the University of Rochester in New York used magnets and other equipment to extract pieces of metal and minerals from Antarctic dirt that is 250 million years old. Analyses showed that particles in the dirt must have come from outer space. Amounts of iron, nickel, and other materials exactly match the composition of a type of meteorite that formed about 4.5 billion years ago. That's around the time that our solar system was born. The discovery doesn't necessarily prove that a meteor caused mass extinctions 250 million years ago. It only shows that they happened at around the same time. Still, it now seems clear that big meteors can spell big trouble for life on earth. Luckily for us, such collisions are extremely rare!—E. Sohn

Killer Space Rock Snuffed Out Ancient Life
Killer Space Rock Snuffed Out Ancient Life








Designed and Powered by HBJamaica.com™