Agriculture
Fast-flying fungal spores
Keeping Bugs Away from Food
Cleaning Up Fish Farms
Amphibians
Bullfrogs
Poison Dart Frogs
Frogs and Toads
Animals
Cannibal Crickets
Stunts for High-Diving Ants
Polar Bears in Trouble
Behavior
Homework blues
The case of the headless ant
Wired for Math
Birds
Parrots
Ducks
Roadrunners
Chemistry and Materials
Bandages that could bite back
Sugary Survival Skill
Screaming for Ice Cream
Computers
A New Look at Saturn's rings
A Classroom of the Mind
Getting in Touch with Touch
Dinosaurs and Fossils
A Living Fossil
Did Dinosaurs Do Handstands?
An Ancient Feathered Biplane
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
Polar Ice Feels the Heat
Detecting an Eerie Sea Glow
Earth Rocks On
Environment
Hazy with a Chance of Sunshine
Toxic Cleanups Get a Microbe Boost
A Change in Leaf Color
Finding the Past
Your inner Neandertal
Early Maya Writing
Prehistoric Trips to the Dentist
Fish
Skates
Marlin
Lampreys
Food and Nutrition
Allergies: From Bee Stings to Peanuts
Sponges' secret weapon
Building a Food Pyramid
GSAT English Rules
Subject and Verb Agreement
Who vs. That vs. Which
Whoever vs. Whomever
GSAT Exam Preparation Jamaica
The Annual GSAT Scholarships
How are students placed after passing the GSAT exam
2014 GSAT Results for Jamaican Kids
GSAT Exams Jamaica Scholarships
GSAT Exam Preparation
42,000 students will sit for the GSAT Exam in two weeks
GSAT stars reap scholarship glory
GSAT Mathematics
42,000 students will sit for the GSAT Exam in two weeks
Math of the World
Prime Time for Cicadas
Human Body
Taste Messenger
Attacking Asthma
Running with Sneaker Science
Invertebrates
Octopuses
Invertebrates
Lice
Mammals
Yaks
Persian Cats
Beavers
Parents
The Surprising Meaning and Benefits of Nursery Rhymes
Raise a Lifelong Reader by Reading Aloud
Expert report highlights the importance to parents of reading to children!
Physics
Black Hole Journey
Dreams of Floating in Space
One ring around them all
Plants
A Giant Flower's New Family
White fuzzy mold not as friendly as it looks
Tracking the Sun Improves Plant Pollen
Reptiles
Anacondas
Komodo Dragons
Crocodilians
Space and Astronomy
Asteroid Lost and Found
Wrong-way planets do gymnastics
A Dusty Birthplace
Technology and Engineering
A Satellite of Your Own
Morphing a Wing to Save Fuel
Supersuits for Superheroes
The Parts of Speech
Adjectives and Adverbs
What is a Verb?
What is a Preposition?
Transportation
Morphing a Wing to Save Fuel
Are Propellers Fin-ished?
Charged cars that would charge
Weather
Warmest Year on Record
Where rivers run uphill
Polar Ice Feels the Heat
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™