Agriculture
Hungry bug seeks hot meal
Flush-Free Fertilizer
Watering the Air
Amphibians
Toads
Newts
Frogs and Toads
Animals
Sea Lilies on the Run
Insects Take a Breather
Young Ants in the Kitchen
Behavior
Taking a Spill for Science
Monkeys in the Mirror
Math Naturals
Birds
Swans
Ibises
Chicken
Chemistry and Materials
Unscrambling a Gem of a Mystery
Nanomagnets Corral Oil
Supersonic Splash
Computers
New twists for phantom limbs
Programming with Alice
Fingerprint Evidence
Dinosaurs and Fossils
Early Birds Ready to Rumble
From Mammoth to Modern Elephant
Dino Bite Leaves a Tooth
E Learning Jamaica
E Learning in Jamaica WIN PRIZES and try our Fun Animated Games
2014 GSAT Results for Jamaican Kids
Results of GSAT are in schools this week
Earth
Earth's Poles in Peril
Ice Age Melting and Rising Seas
Coral Gardens
Environment
When Fungi and Algae Marry
Fungus Hunt
A Change in Leaf Color
Finding the Past
A Long Haul
Settling the Americas
Preserving Ancient Warrior Paint
Fish
Bass
Piranha
Pygmy Sharks
Food and Nutrition
Symbols from the Stone Age
The mercury in that tuna
In Search of the Perfect French Fry
GSAT English Rules
Who vs. That vs. Which
Pronouns
Capitalization Rules
GSAT Exam Preparation Jamaica
E Learning in Jamaica WIN PRIZES and try our Fun Animated Games
GSAT Practice Papers | GSAT Mathematics | Maths
How are students placed after passing the GSAT exam
GSAT Exams Jamaica Scholarships
Access denied - Disabled boy aces GSAT
GSAT Exam Preparation
GSAT Practice Papers | GSAT Mathematics | Maths
GSAT Mathematics
E Learning in Jamaica WIN PRIZES and try our Fun Animated Games
It's a Math World for Animals
Math is a real brain bender
Human Body
A Fix for Injured Knees
Gut Microbes and Weight
Teen Brains, Under Construction
Invertebrates
Shrimps
Spiders
Horseshoe Crabs
Mammals
Domestic Shorthairs
German Shepherds
Asiatic Bears
Parents
What Not to Say to Emerging Readers
Raise a Lifelong Reader by Reading Aloud
Children and Media
Physics
Project Music
Road Bumps
Hold on to your stars, ladies and gentlemen
Plants
Flower family knows its roots
Tracking the Sun Improves Plant Pollen
Making the most of a meal
Reptiles
Copperhead Snakes
Gila Monsters
Rattlesnakes
Space and Astronomy
Burst Busters
Dark Galaxy
Big Galaxy Swallows Little Galaxy
Technology and Engineering
A Micro-Dose of Your Own Medicine
Smart Windows
Supersuits for Superheroes
The Parts of Speech
Problems with Prepositions
Countable and Uncountable Nouns
What is a Verb?
Transportation
Morphing a Wing to Save Fuel
Middle school science adventures
Ready, unplug, drive
Weather
Either Martians or Mars has gas
Where rivers run uphill
Watering the Air
Add your Article

Not Slippery When Wet

A gecko has amazingly sticky feet (see "How a Gecko Defies Gravity"). In fact, if you pull hard enough on a gecko stuck to a glass plate, you might break the plate. A tree frog's foot doesn't have so powerful a grip, but it still must allow the frog to climb wet, slippery leaves—sometimes while the frog is upside down. Now, scientists have figured out how a tree frog manages to keep its grip. A tree frog's foot is covered with a wet film. This layer of fluid led scientists to think that the frog's wet toe pads cling to a surface by the same force that makes a damp piece of paper stick to a window. But this didn't explain how a frog could walk on something wet, such as a rock in a stream or a branch in the rain. To answer this question, Walter Federle of the University of Cambridge in England and a team of scientists took pictures of tree frogs walking on glass. By magnifying the pictures and making measurements, the researchers found that the wet layer on a frog's foot is very thin. In some places, there's no film at all. It turns out that a tree frog has tiny bumps on the bottom of its feet, almost like soccer cleats. Because the wet film is so thin, these bumps poke through and stay dry, giving a tree frog better traction when climbing slippery surfaces. A tree frog's toe pads also have little channels along which fluid can flow. On wet surfaces, the channels funnel away extra fluid. On dry or uneven surfaces, they bring additional fluid to the pads, allowing the frog to cling more tightly or even hang upside down. A tree frog's foot is covered with a wet film. This layer of fluid led scientists to think that the frog's wet toe pads cling to a surface by the same force that makes a damp piece of paper stick to a window. But this didn't explain how a frog could walk on something wet, such as a rock in a stream or a branch in the rain. To answer this question, Walter Federle of the University of Cambridge in England and a team of scientists took pictures of tree frogs walking on glass. By magnifying the pictures and making measurements, the researchers found that the wet layer on a frog's foot is very thin. In some places, there's no film at all. It turns out that a tree frog has tiny bumps on the bottom of its feet, almost like soccer cleats. Because the wet film is so thin, these bumps poke through and stay dry, giving a tree frog better traction when climbing slippery surfaces. A tree frog's toe pads also have little channels along which fluid can flow. On wet surfaces, the channels funnel away extra fluid. On dry or uneven surfaces, they bring additional fluid to the pads, allowing the frog to cling more tightly or even hang upside down. A tree frog's foot is covered with a wet film. This layer of fluid led scientists to think that the frog's wet toe pads cling to a surface by the same force that makes a damp piece of paper stick to a window. But this didn't explain how a frog could walk on something wet, such as a rock in a stream or a branch in the rain. To answer this question, Walter Federle of the University of Cambridge in England and a team of scientists took pictures of tree frogs walking on glass. By magnifying the pictures and making measurements, the researchers found that the wet layer on a frog's foot is very thin. In some places, there's no film at all. It turns out that a tree frog has tiny bumps on the bottom of its feet, almost like soccer cleats. Because the wet film is so thin, these bumps poke through and stay dry, giving a tree frog better traction when climbing slippery surfaces. A tree frog's toe pads also have little channels along which fluid can flow. On wet surfaces, the channels funnel away extra fluid. On dry or uneven surfaces, they bring additional fluid to the pads, allowing the frog to cling more tightly or even hang upside down. A tree frog's foot is covered with a wet film. This layer of fluid led scientists to think that the frog's wet toe pads cling to a surface by the same force that makes a damp piece of paper stick to a window. But this didn't explain how a frog could walk on something wet, such as a rock in a stream or a branch in the rain. To answer this question, Walter Federle of the University of Cambridge in England and a team of scientists took pictures of tree frogs walking on glass. By magnifying the pictures and making measurements, the researchers found that the wet layer on a frog's foot is very thin. In some places, there's no film at all. It turns out that a tree frog has tiny bumps on the bottom of its feet, almost like soccer cleats. Because the wet film is so thin, these bumps poke through and stay dry, giving a tree frog better traction when climbing slippery surfaces. A tree frog's toe pads also have little channels along which fluid can flow. On wet surfaces, the channels funnel away extra fluid. On dry or uneven surfaces, they bring additional fluid to the pads, allowing the frog to cling more tightly or even hang upside down. A tree frog's foot is covered with a wet film. This layer of fluid led scientists to think that the frog's wet toe pads cling to a surface by the same force that makes a damp piece of paper stick to a window. But this didn't explain how a frog could walk on something wet, such as a rock in a stream or a branch in the rain. To answer this question, Walter Federle of the University of Cambridge in England and a team of scientists took pictures of tree frogs walking on glass. By magnifying the pictures and making measurements, the researchers found that the wet layer on a frog's foot is very thin. In some places, there's no film at all. It turns out that a tree frog has tiny bumps on the bottom of its feet, almost like soccer cleats. Because the wet film is so thin, these bumps poke through and stay dry, giving a tree frog better traction when climbing slippery surfaces. A tree frog's toe pads also have little channels along which fluid can flow. On wet surfaces, the channels funnel away extra fluid. On dry or uneven surfaces, they bring additional fluid to the pads, allowing the frog to cling more tightly or even hang upside down. A tree frog's foot is covered with a wet film. This layer of fluid led scientists to think that the frog's wet toe pads cling to a surface by the same force that makes a damp piece of paper stick to a window. But this didn't explain how a frog could walk on something wet, such as a rock in a stream or a branch in the rain. To answer this question, Walter Federle of the University of Cambridge in England and a team of scientists took pictures of tree frogs walking on glass. By magnifying the pictures and making measurements, the researchers found that the wet layer on a frog's foot is very thin. In some places, there's no film at all. It turns out that a tree frog has tiny bumps on the bottom of its feet, almost like soccer cleats. Because the wet film is so thin, these bumps poke through and stay dry, giving a tree frog better traction when climbing slippery surfaces. A tree frog's toe pads also have little channels along which fluid can flow. On wet surfaces, the channels funnel away extra fluid. On dry or uneven surfaces, they bring additional fluid to the pads, allowing the frog to cling more tightly or even hang upside down. A tree frog's foot is covered with a wet film. This layer of fluid led scientists to think that the frog's wet toe pads cling to a surface by the same force that makes a damp piece of paper stick to a window. But this didn't explain how a frog could walk on something wet, such as a rock in a stream or a branch in the rain. To answer this question, Walter Federle of the University of Cambridge in England and a team of scientists took pictures of tree frogs walking on glass. By magnifying the pictures and making measurements, the researchers found that the wet layer on a frog's foot is very thin. In some places, there's no film at all. It turns out that a tree frog has tiny bumps on the bottom of its feet, almost like soccer cleats. Because the wet film is so thin, these bumps poke through and stay dry, giving a tree frog better traction when climbing slippery surfaces. A tree frog's toe pads also have little channels along which fluid can flow. On wet surfaces, the channels funnel away extra fluid. On dry or uneven surfaces, they bring additional fluid to the pads, allowing the frog to cling more tightly or even hang upside down. A tree frog's foot is covered with a wet film. This layer of fluid led scientists to think that the frog's wet toe pads cling to a surface by the same force that makes a damp piece of paper stick to a window. But this didn't explain how a frog could walk on something wet, such as a rock in a stream or a branch in the rain. To answer this question, Walter Federle of the University of Cambridge in England and a team of scientists took pictures of tree frogs walking on glass. By magnifying the pictures and making measurements, the researchers found that the wet layer on a frog's foot is very thin. In some places, there's no film at all. It turns out that a tree frog has tiny bumps on the bottom of its feet, almost like soccer cleats. Because the wet film is so thin, these bumps poke through and stay dry, giving a tree frog better traction when climbing slippery surfaces. A tree frog's toe pads also have little channels along which fluid can flow. On wet surfaces, the channels funnel away extra fluid. On dry or uneven surfaces, they bring additional fluid to the pads, allowing the frog to cling more tightly or even hang upside down. A tree frog's foot is covered with a wet film. This layer of fluid led scientists to think that the frog's wet toe pads cling to a surface by the same force that makes a damp piece of paper stick to a window. But this didn't explain how a frog could walk on something wet, such as a rock in a stream or a branch in the rain. To answer this question, Walter Federle of the University of Cambridge in England and a team of scientists took pictures of tree frogs walking on glass. By magnifying the pictures and making measurements, the researchers found that the wet layer on a frog's foot is very thin. In some places, there's no film at all. It turns out that a tree frog has tiny bumps on the bottom of its feet, almost like soccer cleats. Because the wet film is so thin, these bumps poke through and stay dry, giving a tree frog better traction when climbing slippery surfaces. A tree frog's toe pads also have little channels along which fluid can flow. On wet surfaces, the channels funnel away extra fluid. On dry or uneven surfaces, they bring additional fluid to the pads, allowing the frog to cling more tightly or even hang upside down. A tree frog's foot is covered with a wet film. This layer of fluid led scientists to think that the frog's wet toe pads cling to a surface by the same force that makes a damp piece of paper stick to a window. But this didn't explain how a frog could walk on something wet, such as a rock in a stream or a branch in the rain. To answer this question, Walter Federle of the University of Cambridge in England and a team of scientists took pictures of tree frogs walking on glass. By magnifying the pictures and making measurements, the researchers found that the wet layer on a frog's foot is very thin. In some places, there's no film at all. It turns out that a tree frog has tiny bumps on the bottom of its feet, almost like soccer cleats. Because the wet film is so thin, these bumps poke through and stay dry, giving a tree frog better traction when climbing slippery surfaces. A tree frog's toe pads also have little channels along which fluid can flow. On wet surfaces, the channels funnel away extra fluid. On dry or uneven surfaces, they bring additional fluid to the pads, allowing the frog to cling more tightly or even hang upside down. A tree frog's foot is covered with a wet film. This layer of fluid led scientists to think that the frog's wet toe pads cling to a surface by the same force that makes a damp piece of paper stick to a window. But this didn't explain how a frog could walk on something wet, such as a rock in a stream or a branch in the rain. To answer this question, Walter Federle of the University of Cambridge in England and a team of scientists took pictures of tree frogs walking on glass. By magnifying the pictures and making measurements, the researchers found that the wet layer on a frog's foot is very thin. In some places, there's no film at all. It turns out that a tree frog has tiny bumps on the bottom of its feet, almost like soccer cleats. Because the wet film is so thin, these bumps poke through and stay dry, giving a tree frog better traction when climbing slippery surfaces. A tree frog's toe pads also have little channels along which fluid can flow. On wet surfaces, the channels funnel away extra fluid. On dry or uneven surfaces, they bring additional fluid to the pads, allowing the frog to cling more tightly or even hang upside down. A tree frog's foot is covered with a wet film. This layer of fluid led scientists to think that the frog's wet toe pads cling to a surface by the same force that makes a damp piece of paper stick to a window. But this didn't explain how a frog could walk on something wet, such as a rock in a stream or a branch in the rain. To answer this question, Walter Federle of the University of Cambridge in England and a team of scientists took pictures of tree frogs walking on glass. By magnifying the pictures and making measurements, the researchers found that the wet layer on a frog's foot is very thin. In some places, there's no film at all. It turns out that a tree frog has tiny bumps on the bottom of its feet, almost like soccer cleats. Because the wet film is so thin, these bumps poke through and stay dry, giving a tree frog better traction when climbing slippery surfaces. A tree frog's toe pads also have little channels along which fluid can flow. On wet surfaces, the channels funnel away extra fluid. On dry or uneven surfaces, they bring additional fluid to the pads, allowing the frog to cling more tightly or even hang upside down. A tree frog's foot is covered with a wet film. This layer of fluid led scientists to think that the frog's wet toe pads cling to a surface by the same force that makes a damp piece of paper stick to a window. But this didn't explain how a frog could walk on something wet, such as a rock in a stream or a branch in the rain. To answer this question, Walter Federle of the University of Cambridge in England and a team of scientists took pictures of tree frogs walking on glass. By magnifying the pictures and making measurements, the researchers found that the wet layer on a frog's foot is very thin. In some places, there's no film at all. It turns out that a tree frog has tiny bumps on the bottom of its feet, almost like soccer cleats. Because the wet film is so thin, these bumps poke through and stay dry, giving a tree frog better traction when climbing slippery surfaces. A tree frog's toe pads also have little channels along which fluid can flow. On wet surfaces, the channels funnel away extra fluid. On dry or uneven surfaces, they bring additional fluid to the pads, allowing the frog to cling more tightly or even hang upside down. A tree frog's foot is covered with a wet film. This layer of fluid led scientists to think that the frog's wet toe pads cling to a surface by the same force that makes a damp piece of paper stick to a window. But this didn't explain how a frog could walk on something wet, such as a rock in a stream or a branch in the rain. To answer this question, Walter Federle of the University of Cambridge in England and a team of scientists took pictures of tree frogs walking on glass. By magnifying the pictures and making measurements, the researchers found that the wet layer on a frog's foot is very thin. In some places, there's no film at all. It turns out that a tree frog has tiny bumps on the bottom of its feet, almost like soccer cleats. Because the wet film is so thin, these bumps poke through and stay dry, giving a tree frog better traction when climbing slippery surfaces. A tree frog's toe pads also have little channels along which fluid can flow. On wet surfaces, the channels funnel away extra fluid. On dry or uneven surfaces, they bring additional fluid to the pads, allowing the frog to cling more tightly or even hang upside down. A tree frog's foot is covered with a wet film. This layer of fluid led scientists to think that the frog's wet toe pads cling to a surface by the same force that makes a damp piece of paper stick to a window. But this didn't explain how a frog could walk on something wet, such as a rock in a stream or a branch in the rain. To answer this question, Walter Federle of the University of Cambridge in England and a team of scientists took pictures of tree frogs walking on glass. By magnifying the pictures and making measurements, the researchers found that the wet layer on a frog's foot is very thin. In some places, there's no film at all. It turns out that a tree frog has tiny bumps on the bottom of its feet, almost like soccer cleats. Because the wet film is so thin, these bumps poke through and stay dry, giving a tree frog better traction when climbing slippery surfaces. A tree frog's toe pads also have little channels along which fluid can flow. On wet surfaces, the channels funnel away extra fluid. On dry or uneven surfaces, they bring additional fluid to the pads, allowing the frog to cling more tightly or even hang upside down. A tree frog's foot is covered with a wet film. This layer of fluid led scientists to think that the frog's wet toe pads cling to a surface by the same force that makes a damp piece of paper stick to a window. But this didn't explain how a frog could walk on something wet, such as a rock in a stream or a branch in the rain. To answer this question, Walter Federle of the University of Cambridge in England and a team of scientists took pictures of tree frogs walking on glass. By magnifying the pictures and making measurements, the researchers found that the wet layer on a frog's foot is very thin. In some places, there's no film at all. It turns out that a tree frog has tiny bumps on the bottom of its feet, almost like soccer cleats. Because the wet film is so thin, these bumps poke through and stay dry, giving a tree frog better traction when climbing slippery surfaces. A tree frog's toe pads also have little channels along which fluid can flow. On wet surfaces, the channels funnel away extra fluid. On dry or uneven surfaces, they bring additional fluid to the pads, allowing the frog to cling more tightly or even hang upside down. A tree frog's foot is covered with a wet film. This layer of fluid led scientists to think that the frog's wet toe pads cling to a surface by the same force that makes a damp piece of paper stick to a window. But this didn't explain how a frog could walk on something wet, such as a rock in a stream or a branch in the rain. To answer this question, Walter Federle of the University of Cambridge in England and a team of scientists took pictures of tree frogs walking on glass. By magnifying the pictures and making measurements, the researchers found that the wet layer on a frog's foot is very thin. In some places, there's no film at all. It turns out that a tree frog has tiny bumps on the bottom of its feet, almost like soccer cleats. Because the wet film is so thin, these bumps poke through and stay dry, giving a tree frog better traction when climbing slippery surfaces. A tree frog's toe pads also have little channels along which fluid can flow. On wet surfaces, the channels funnel away extra fluid. On dry or uneven surfaces, they bring additional fluid to the pads, allowing the frog to cling more tightly or even hang upside down. A tree frog's foot is covered with a wet film. This layer of fluid led scientists to think that the frog's wet toe pads cling to a surface by the same force that makes a damp piece of paper stick to a window. But this didn't explain how a frog could walk on something wet, such as a rock in a stream or a branch in the rain. To answer this question, Walter Federle of the University of Cambridge in England and a team of scientists took pictures of tree frogs walking on glass. By magnifying the pictures and making measurements, the researchers found that the wet layer on a frog's foot is very thin. In some places, there's no film at all. It turns out that a tree frog has tiny bumps on the bottom of its feet, almost like soccer cleats. Because the wet film is so thin, these bumps poke through and stay dry, giving a tree frog better traction when climbing slippery surfaces. A tree frog's toe pads also have little channels along which fluid can flow. On wet surfaces, the channels funnel away extra fluid. On dry or uneven surfaces, they bring additional fluid to the pads, allowing the frog to cling more tightly or even hang upside down. A tree frog's foot is covered with a wet film. This layer of fluid led scientists to think that the frog's wet toe pads cling to a surface by the same force that makes a damp piece of paper stick to a window. But this didn't explain how a frog could walk on something wet, such as a rock in a stream or a branch in the rain. To answer this question, Walter Federle of the University of Cambridge in England and a team of scientists took pictures of tree frogs walking on glass. By magnifying the pictures and making measurements, the researchers found that the wet layer on a frog's foot is very thin. In some places, there's no film at all. It turns out that a tree frog has tiny bumps on the bottom of its feet, almost like soccer cleats. Because the wet film is so thin, these bumps poke through and stay dry, giving a tree frog better traction when climbing slippery surfaces. A tree frog's toe pads also have little channels along which fluid can flow. On wet surfaces, the channels funnel away extra fluid. On dry or uneven surfaces, they bring additional fluid to the pads, allowing the frog to cling more tightly or even hang upside down. A tree frog's foot is covered with a wet film. This layer of fluid led scientists to think that the frog's wet toe pads cling to a surface by the same force that makes a damp piece of paper stick to a window. But this didn't explain how a frog could walk on something wet, such as a rock in a stream or a branch in the rain. To answer this question, Walter Federle of the University of Cambridge in England and a team of scientists took pictures of tree frogs walking on glass. By magnifying the pictures and making measurements, the researchers found that the wet layer on a frog's foot is very thin. In some places, there's no film at all. It turns out that a tree frog has tiny bumps on the bottom of its feet, almost like soccer cleats. Because the wet film is so thin, these bumps poke through and stay dry, giving a tree frog better traction when climbing slippery surfaces. A tree frog's toe pads also have little channels along which fluid can flow. On wet surfaces, the channels funnel away extra fluid. On dry or uneven surfaces, they bring additional fluid to the pads, allowing the frog to cling more tightly or even hang upside down. A gecko's feet have inspired a new type of adhesive tape (see "Sticking Around with Gecko Tape"). If engineers can figure out how to imitate a tree frog's foot, we might someday have car tires that stick to the road even when the road's wet.—E. Jaffe

Not Slippery When Wet
Not Slippery When Wet








Designed and Powered by HBJamaica.com™