Agriculture
Cleaning Up Fish Farms
Silk’s superpowers
Getting the dirt on carbon
Amphibians
Frogs and Toads
Poison Dart Frogs
Newts
Animals
Sleep Affects a Bird's Singing
Chicken Talk
Ant Invasions Change the Rules
Behavior
Contemplating thought
Nice Chimps
Fish needs see-through head
Birds
Dodos
Pheasants
Tropical Birds
Chemistry and Materials
Watching out for vultures
Bandages that could bite back
The chemistry of sleeplessness
Computers
Troubles with Hubble
Supersonic Splash
A New Look at Saturn's rings
Dinosaurs and Fossils
An Ancient Feathered Biplane
Downsized Dinosaurs
Some Dinos Dined on Grass
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
Earth
Coral Gardens
Explorer of the Extreme Deep
Plastic-munching microbes
Environment
Whale Watch
Plant Gas
Sounds and Silence
Finding the Past
Little People Cause Big Surprise
Chicken of the Sea
Watching deep-space fireworks
Fish
Electric Catfish
Goldfish
Lungfish
Food and Nutrition
Allergies: From Bee Stings to Peanuts
Eat Out, Eat Smart
A Pepper Part that Burns Fat
GSAT English Rules
Finding Subjects and Verbs
Order of Adjectives
Pronouns
GSAT Exam Preparation Jamaica
The Annual GSAT Scholarships
Scotiabank Jamaica Foundation Grade Six Achievement Test (GSAT) Scholarships
GSAT Exam Preparation
GSAT Exams Jamaica Scholarships
Access denied - Disabled boy aces GSAT
GSAT Practice Papers | GSAT Mathematics | Maths
GSAT stars reap scholarship glory
GSAT Mathematics
GSAT Practice Papers | GSAT Mathematics | Maths
Monkeys Count
Secrets of an Ancient Computer
Human Body
Remembering Facts and Feelings
Hear, Hear
Running with Sneaker Science
Invertebrates
Nautiluses
Scorpions
Cockroaches
Mammals
Manxes
Dachshunds
Hoofed Mammals
Parents
Raise a Lifelong Reader by Reading Aloud
Expert report highlights the importance to parents of reading to children!
Children and Media
Physics
Project Music
Powering Ball Lightning
Road Bumps
Plants
Farms sprout in cities
Cactus Goo for Clean Water
When Fungi and Algae Marry
Reptiles
Snapping Turtles
Rattlesnakes
Turtles
Space and Astronomy
A Puffy Planetary Puzzle
Sounds of Titan
Return to Space
Technology and Engineering
Drawing Energy out of Wastewater
Bionic Bacteria
Morphing a Wing to Save Fuel
The Parts of Speech
Adjectives and Adverbs
Pronouns
What is a Verb?
Transportation
Where rivers run uphill
Are Propellers Fin-ished?
Tinkering With the Basic Bike
Weather
Where rivers run uphill
In Antarctica watch the heat (and your step)
Watering the Air
Add your Article

Hearing Whales

Ears are for hearing—everyone knows that. But for a creature called the Cuvier's beaked whale, hearing starts in the throat, a new study finds. The observation might help explain how all whales hear, researchers say. The work might also help scientists understand how animals are affected by underwater sonar. This radarlike technology, used by some ships, sends out sound waves to detect and locate underwater objects. The Cuvier's beaked whale is a so-called toothed whale. About 80 species belong to this group, which also includes pilot whales, dolphins, orcas, and sperm whales. Toothed whales dive deep into the ocean in search of food. As the whales hunt, they produce sounds that bounce off objects and then return to the whales. This process, called echolocation, allows the animals to "see" the shape, size, and location of their prey, even when they're 1,000 meters deep under the sea, where it is totally dark (see "Echoes of Hunting"). To better understand how the whale hears, researchers from San Diego State University in California took three-dimensional X rays of two Cuvier's beaked whales. The whales had died and washed up on the beach. Ted Cranford and his San Diego State colleagues used the images to create a computer model of a Cuvier whale's head. Then, they modeled the process of sound traveling through the head. The researchers knew that some sounds get to the ears of a toothed whale through a structure called the acoustic window. Found on the lower jaw, this structure is very thin on the outside and has a large pad of fat on the inside. When the researchers used their computer model to track how sound waves travel in the whale's head, they were surprised to find that sounds coming from right in front of the whale actually travel under the animal's jaw. From there, sound waves move through the throat, into a hole in the back of the jaw, and finally to the pad of fat near the animal's ears. Cranford suspects that other types of whales may hear through their throats. Further testing is needed to be sure. Eventually, insight into how whales hear might explain whether sonar testing by military ships is causing a spike in whale strandings—when the animals seem to get confused and wind up on beaches.—Emily Sohn

Hearing Whales
Hearing Whales








Designed and Powered by HBJamaica.com™