Fast-flying fungal spores
Seeds of the Future
Flush-Free Fertilizer
Salamanders and Newts
Frogs and Toads
Fishing for Giant Squid
Young Ants in the Kitchen
Little Beetle, Big Horns
Eating Troubles
Copycat Monkeys
Slumber by the numbers
A Meal Plan for Birds
Chemistry and Materials
The memory of a material
The chemistry of sleeplessness
The solar system's biggest junkyard
The Earth-bound asteroid scientists saw coming
Small but WISE
New twists for phantom limbs
Dinosaurs and Fossils
Digging for Ancient DNA
Dino-Dining Dinosaurs
E Learning Jamaica
2014 GSAT Results for Jamaican Kids
Results of GSAT are in schools this week
E Learning in Jamaica WIN PRIZES and try our Fun Animated Games
Coral Gardens
A Great Quake Coming?
Island of Hope
Indoor ozone stopper
Where rivers run uphill
Pumping Up Poison Ivy
Finding the Past
A Plankhouse Past
Fakes in the museum
The Puzzle of Ancient Mariners
Basking Sharks
Food and Nutrition
A Taste for Cheese
Packing Fat
Healing Honey
GSAT English Rules
Order of Adjectives
Adjectives and Adverbs
Who vs. That vs. Which
GSAT Exam Preparation Jamaica
Mastering The GSAT Exam
Results of GSAT are in schools this week
E Learning in Jamaica WIN PRIZES and try our Fun Animated Games
GSAT Exams Jamaica Scholarships
GSAT Practice Papers | GSAT Mathematics | Maths
GSAT stars reap scholarship glory
GSAT Scholarship
GSAT Mathematics
How a Venus Flytrap Snaps Shut
How to Slice a Cake Fairly
Setting a Prime Number Record
Human Body
Cell Phones and Possible Health Hazards
From Stem Cell to Any Cell
Attacking Asthma
Choosing a Preschool: What to Consider
Raise a Lifelong Reader by Reading Aloud
The Surprising Meaning and Benefits of Nursery Rhymes
Thinner Air, Less Splatter
Road Bumps
Strange Universe: The Stuff of Darkness
The algae invasion
Fastest Plant on Earth
Springing forward
Space and Astronomy
Burst Busters
Older Stars, New Age for the Universe
Sounds of Titan
Technology and Engineering
Morphing a Wing to Save Fuel
Space Umbrellas to Shield Earth
Beyond Bar Codes
The Parts of Speech
What is a Noun
What is a Verb?
Reach for the Sky
Charged cars that would charge
Ready, unplug, drive
In Antarctica watch the heat (and your step)
Recipe for a Hurricane
Watering the Air
Add your Article

Ultrasonic Frogs Raise the Pitch

Cartoon superheroes have included bats, spiders, and turtles. It may be time to add frogs to the list of animals that have special powers. Scientists have found signs of ultrasonic communication in a frog species that lives in China. Ultrasonic signals have such a high pitch that people can't hear them. This type of frog is the first amphibian ever discovered to have such sensitive ears. Concave-eared torrent frogs are small and brown. They make a variety of noises, including some that people can hear. Their calls sound like bird whistles and chirps. Using equipment designed to study the very high-pitched bleeps that bats make, scientists have found that the frog calls also include very high-pitched chirps that topped 20 kilohertz (20,000 cycles per second)—sound frequencies that people can't hear. Concave-eared torrent frogs are found on a mountainside next to a rock-filled stream at China's Huangshan Hot Springs. When scientists visited the site, they discovered that the noise from water rushing over the rocks was so loud that they had to shout all the time to hear each other. The researchers suspected that ultrasonic signaling would allow these frogs to hear each other over the babbling racket. To test this idea, they played recordings of different parts of a frog's calls. When they played just ultrasonic parts, a male frog responded immediately by calling back. A few other males called, too, though not as soon afterward. Next, the scientists tested the brains of some of these frogs. Their results showed that frog nerve cells are sensitive to frequencies as high as 34 kilohertz. This finding suggests that torrent frogs can actually hear ultrasonic sounds and probably use them to communicate. Other frogs normally hear only much lower pitches.—E. Sohn

Ultrasonic Frogs Raise the Pitch
Ultrasonic Frogs Raise the Pitch

Designed and Powered by™