Silk’s superpowers
Cleaning Up Fish Farms
Getting the dirt on carbon
Poison Dart Frogs
Tree Frogs
How to Fly Like a Bat
Deep Krill
Navigating by the Light of the Moon
Meet your mysterious relative
The Snappy Lingo of Instant Messages
Longer lives for wild elephants
Backyard Birds
Chemistry and Materials
Diamond Glow
Supersonic Splash
Salt secrets
Play for Science
Troubles with Hubble
The Earth-bound asteroid scientists saw coming
Dinosaurs and Fossils
Dinosaur Eggs-citement
A Really Big (but Extinct) Rodent
Fossil Fly from Antarctica
E Learning Jamaica
2014 GSAT Results for Jamaican Kids
E Learning in Jamaica WIN PRIZES and try our Fun Animated Games
Results of GSAT are in schools this week
Less Mixing Can Affect Lake's Ecosystem
Life under Ice
Springing forward
What is groundwater
Groundwater and the Water Cycle
Alien Invasions
Finding the Past
An Ancient Childhood
Big Woman of the Distant Past
Stonehenge Settlement
Pygmy Sharks
Puffer Fish
Food and Nutrition
A Taste for Cheese
How Super Are Superfruits?
Chew for Health
GSAT English Rules
Capitalization Rules
Subject and Verb Agreement
GSAT Exam Preparation Jamaica
Preparing for the GSAT Exam
March 21-22, 2013: Over 43,000 students will take the GSAT Exam
E Learning in Jamaica WIN PRIZES and try our Fun Animated Games
GSAT Exams Jamaica Scholarships
Access denied - Disabled boy aces GSAT
2014 GSAT Results for Jamaican Kids
42,000 students will sit for the GSAT Exam in two weeks
GSAT Mathematics
A Sweet Advance in Candy Packing
It's a Math World for Animals
Detecting True Art
Human Body
A Long Trek to Asia
Taking the sting out of scorpion venom
Don't Eat That Sandwich!
Shih Tzus
The Surprising Meaning and Benefits of Nursery Rhymes
Raise a Lifelong Reader by Reading Aloud
Choosing a Preschool: What to Consider
Gaining a Swift Lift
Strange Universe: The Stuff of Darkness
Invisibility Ring
A Giant Flower's New Family
Bright Blooms That Glow
Making the most of a meal
Boa Constrictors
Space and Astronomy
Mercury's magnetic twisters
A Dusty Birthplace
Big Galaxy Swallows Little Galaxy
Technology and Engineering
Algae Motors
Drawing Energy out of Wastewater
Young Scientists Take Flight
The Parts of Speech
Countable and Uncountable Nouns
Adjectives and Adverbs
What is a Verb?
Middle school science adventures
Ready, unplug, drive
How to Fly Like a Bat
In Antarctica watch the heat (and your step)
Recipe for a Hurricane
Polar Ice Feels the Heat
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Heart Revival

When your heart works like it's supposed to, it keeps you alive and well. But when the heart fails, people can get very sick or even die. Now, scientists have found a way to turn dead rat hearts into living ones. It's a medical first, and the technique may eventually allow doctors to make new hearts from patients' own cells. This should largely avoid the risk that the patient's body will reject the new heart, which often happens today. Researchers from the University of Minnesota in Minneapolis started with hearts from rats that had been dead for less than 18 hours. Led by Doris A. Taylor, the scientists put the hearts in glass beakers and used a liquid detergent to wash away the dead cells. Left behind was a heart-shaped mass of proteins that normally surround heart cells and hold them together. The mass was translucent, which means it lets light through, and it had the consistency of Jell-O. Next, Taylor and her colleagues took cells from hearts of newborn rats. They injected these living cells into the hollowed-out hearts. Eight days later, the hearts were pumping weakly. And the injected cells in each heart beat synchronously—that is, all at the same time. "The fact that we can get these cells to beat synchronously is incredibly encouraging," Taylor says. It will be years before doctors might consider using this method to repair hearts in people, the scientists warn. In the study, the rebuilt hearts could pump blood only about 2 percent as fast as a normal adult rat heart can. Eventually, scientists would like to be able to use primitive stem cells from a patient's blood or heart tissue to repair his or her own organs.—Emily Sohn

Heart Revival
Heart Revival

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