Agriculture
Growing Healthier Tomato Plants
Watering the Air
Flush-Free Fertilizer
Amphibians
Bullfrogs
Newts
Tree Frogs
Animals
The History of Meow
Koalas, Up Close and Personal
Revenge of the Cowbirds
Behavior
Math is a real brain bender
GSAT Mathematics Quiz, Teaching Math, teaching anxiety
The Electric Brain
Birds
Crows
Cranes
Kookaburras
Chemistry and Materials
Supergoo to the rescue
The newest superheavy in town
Cooking Up Superhard Diamonds
Computers
The Book of Life
A Classroom of the Mind
Electronic Paper Turns a Page
Dinosaurs and Fossils
Early Birds Ready to Rumble
Message in a dinosaur's teeth
Meet the new dinos
E Learning Jamaica
Results of GSAT are in schools this week
E Learning in Jamaica WIN PRIZES and try our Fun Animated Games
2014 GSAT Results for Jamaican Kids
Earth
Earth Rocks On
Quick Quake Alerts
Coral Gardens
Environment
Catching Some Rays
Seabirds Deliver Arctic Pollutants
The Wolf and the Cow
Finding the Past
Watching deep-space fireworks
Digging Up Stone Age Art
Of Lice and Old Clothes
Fish
Nurse Sharks
Bull Sharks
Codfish
Food and Nutrition
Yummy bugs
Allergies: From Bee Stings to Peanuts
Packing Fat
GSAT English Rules
Order of Adjectives
Who vs. Whom
Subject and Verb Agreement
GSAT Exam Preparation Jamaica
Scotiabank Jamaica Foundation Grade Six Achievement Test (GSAT) Scholarships
Preparing for the GSAT Exam
Ministry of Education Announces 82 GSAT Scholarships for 2010
GSAT Exams Jamaica Scholarships
Results of GSAT are in schools this week
Access denied - Disabled boy aces GSAT
GSAT stars reap scholarship glory
GSAT Mathematics
10 Common Mistakes When Preparing for the GSAT Math Test
Math of the World
How to Slice a Cake Fairly
Human Body
Tapeworms and Drug Delivery
Football Scrapes and Nasty Infections
Spitting Up Blobs to Get Around
Invertebrates
Flies
Snails
Crabs
Mammals
Raccoons
Tigers
Great Danes
Parents
What Not to Say to Emerging Readers
Raise a Lifelong Reader by Reading Aloud
Expert report highlights the importance to parents of reading to children!
Physics
Invisibility Ring
Powering Ball Lightning
Thinner Air, Less Splatter
Plants
Underwater Jungles
Hungry bug seeks hot meal
Springing forward
Reptiles
Black Mamba
Crocodiles
Rattlesnakes
Space and Astronomy
A Whole Lot of Nothing
Killers from Outer Space
A Darker, Warmer Red Planet
Technology and Engineering
A Clean Getaway
Space Umbrellas to Shield Earth
Roll-Up Computer Monitors to Go
The Parts of Speech
Adjectives and Adverbs
What is a Preposition?
What is a Verb?
Transportation
Tinkering With the Basic Bike
How to Fly Like a Bat
Reach for the Sky
Weather
Either Martians or Mars has gas
Earth's Poles in Peril
The solar system's biggest junkyard
Add your Article

Sleepless at Sea

Wouldn't it be great to stay up all night without feeling tired the next day? Orca-whale and dolphin babies and moms are champions of sleeplessness. They stay awake for a month after the babies are bornówithout showing any ill effects. And they don't even need extra sleep later on to make up for the loss. Oleg Lyamin of the University of California, Los Angeles studies marine mammals such as orcas and dolphins. He discovered these animals' unusual sleep habits by watching orca Kasatka and her baby Nakai at SeaWorld, San Diego, just after Nakai was born. Kasatka and Nakai swam around their pool 24 hours a day, instead of floating motionless and closing their eyes the way that other adult orcas do when they sleep. Adults typically sleep for 5 to 8 hours. Lyamin and his fellow researchers visited dolphin moms and babies at the Utrish Dolphinarium in Russia to see if they did the same thing. Dolphins are strange sleepers to begin with. A dolphin snoozes with only one-half of its brain at a time, closing one eye and either floating or swimming. But mother and newborn dolphins didn't even sleep that much. Instead, they kept both eyes open and swam around constantly. No other mammal has ever been found to sleep so little for so long. Moreover, most mammal babies, including those of humans, typically need much more sleep than adults do. In contrast, Nakai and the dolphin infants needed even less sleep than their moms. Both mother and baby whales and dolphins gradually increased their sleep to normal adult levels over a period of months. Scientists who study sleep are surprised by the findings. Other animals, such as rats, get sick or die if they're deprived of sleep. Many researchers have argued that people and animals need sleep in order to learn, just as students in school need a good night's rest after studying to do well on an exam. Babies in particular need sleep so that their brains can develop. Both orcas and dolphins are intelligent animals with large brains. Because orca and dolphin babies don't seem to doze at all while their brains are growing, they must not need sleep for learning or brain development, argues Jerry Siegel, who worked with Lyamin. He suggests that sleep serves other, as yet unknown, roles in mammals. It's also possible that orcas and dolphins have evolved special ways to develop and learn without sleep. Or, these marine mammals may simply have an unusual form of "sleep-swimming." It'd be like a sleepwalker who goes to the kitchen, opens the refrigerator, and grabs a snack while brainwave recordings would show he or she is in a deep sleep. Why do orcas and dolphins need to remain constantly active after a baby is born? Maybe they need to stay active to survive, Siegel says. First, newborns need to breathe every 30 seconds, and mothers help push their babies to the surface to breathe, Siegel says. Secondly, baby whales and dolphins haven't yet developed the thick blubber coat that protects them against the cold ocean waters when they're older. Staying active may help keep them warm. Don't try to copy the sleeping feats of orcas and dolphins at home, researchers warn. Scientists may someday learn how to help people skimp on sleep. For now, though, people still have to snooze at least 8 hours a night to stay healthy.óN. Moreira

Sleepless at Sea
Sleepless at Sea








Designed and Powered by HBJamaica.com™