Crossville Chronicle, Crossville, TN

Community News Network

March 10, 2014

Researchers tackle mystery of how some snakes can fly

An ornate, lime-green snake hangs from a branch. Upon spotting a predator, it suddenly propels itself into the air, flattening and wiggling its body until safely landing in a faraway tree.

Flying snakes sound like creatures from a bad B-movie, but these serpents are elegant gliders that have evolved a special skill that sets them apart. In two new studies, engineers have used simulations to try to decipher how the wingless reptile manages to remain airborne despite its lack of flight appendages.

While in the air, the snakes transform their cross-sectional shape, splaying their ribs and flattening their bodies. Through computational and physical modeling, researchers have discovered that this modified shape helps them become more aerodynamic and allows vortexes of air above their bodies to suction them upwards.

"Little by little, we built a theory about how the snakes are interacting with the air to generate very large lift forces," said aeronautical engineer Lorena Barba of George Washington University, who authored a study published in Physics of Fluids on Tuesday.

In a tornado, the low-pressure region is in the center, or eye. Similarly, researchers found areas of low pressure that form on top of the snake's body, creating a small amount of suction and helping to generate lift. In collaboration with flying-snake expert Jake Socha of Virginia Tech, Barba was able to visualize these swirls of air in a complex computer air-flow simulation.

An earlier study by Socha, published in the Journal of Experimental Biology in January, also investigated the flattened shape by using a 3-D printed snake model submerged in a tank of flowing water. Both experiments found that, surprisingly, the reptile has an excellent capacity to generate propelling flight forces, or lift.

They are called "flying snakes," but to be more precise, they are masters of the glide. Found in the lowland rainforests of Southeast and South Asia, flying snakes are fairly small creatures, growing to lengths of only a few feet and about the diameter of a lipstick. But upon jumping from a tall tree, say 30 feet, they can reach a horizontal distance of 10 times their body length.

Text Only
Community News Network
  • Why a see-through mouse is a big deal for scientists

    A group of Caltech researchers announced in Cell Thursday their success in making an entire organism transparent. Unfortunately, this isn't any kind of "Invisible Man" scenario: The organism in question is a mouse, and the mouse in question is quite dead.

    July 31, 2014

  • Screen Shot 2014-07-31 at 2.12.55 PM.png VIDEO: Five-year-old doesn't want her brother to grow up

    Sadie, an adorable 5-year-old from Phoenix, wants her brother to stay young forever, so much so that her emotional reaction to the thought of him getting older has drawn more than 10 million views on YouTube.

    July 31, 2014 1 Photo

  • lockport-police.jpg Police department turns to Facebook for guidance on use of 'negro'

    What seems to be a data entry mistake by a small town police department in western New York has turned into a social media firestorm centered around the word "negro" and whether it's acceptable to use in modern society.

    July 31, 2014 3 Photos

  • The virtues of lying

    Two computational scientists set out recently to simulate the effects of lying in a virtual human population. Their results, published in the Proceedings of the Royal Society B, show that lying is essential for the growth of a cohesive social network.

    July 31, 2014

  • Sunburn isn't the only sign of summer that can leave you itchy and blistered

    You've got a rash. You quickly rule out the usual suspects: You haven't been gardening or hiking or even picnicking, so it's probably not a plant irritant such as poison ivy or wild parsnip; likewise, it's probably not chiggers or ticks carrying Lyme disease; and you haven't been swimming in a pond, which can harbor the parasite that causes swimmer's itch.

    July 30, 2014

  • Survey results in legislation to battle sexual assault on campus

    Missouri U.S. Sen. Claire McCaskill joined a bipartisan group of senators Wednesday to announce legislation that aims to reduce the number of sexual assaults on college campuses.

    July 30, 2014

  • An alarming threat to airlines that no one's talking about

    It's been an abysmal year for the flying public. Planes have crashed in bad weather, disappeared over the Indian Ocean and tragically crossed paths with anti-aircraft missiles over Ukraine.

    July 30, 2014

  • Sharknado.jpg Sharknado 2 set to attack viewers tonight

    In the face of another "Sharknado" TV movie (the even-more-inane "Sharknado 2: The Second One," premiering Wednesday night on Syfy), there isn't much for a critic to say except to echo what the characters themselves so frequently scream when confronted by a great white shark spinning toward them in a funnel cloud:
    "LOOK OUT!!"

    July 30, 2014 1 Photo

  • 20140729-AMX-GIVHAN292.jpg Spanx stretches into new territory with jeans, but promised magic is elusive

    The Spanx empire of stomach-flattening, thigh-slimming, jiggle-reducing foundation garments has expanded to include what the brand promises is the mother of all body-shaping miracles: Spanx jeans.

    July 29, 2014 1 Photo

  • Medical marijuana opponents' most powerful argument is at odds with a mountain of research

    Opponents of marijuana legalization are rapidly losing the battle for hearts and minds. Simply put, the public understands that however you measure the consequences of marijuana use, the drug is significantly less harmful to users and society than tobacco or alcohol.

    July 29, 2014

Marketplace Marquee
Parade
Must Read
Section Teases
Seasonal Content
AP Video
Couple Channel Grief Into Soldiers' Retreat WWI Aviation Still Alive at Aerodrome in NY Raw: Rescuers at Taiwan Explosion Scene Raw: Woman Who Faced Death Over Faith in N.H. Clinton Before 9-11: Could Have Killed Bin Laden Netanyahu Vows to Destroy Hamas Tunnels Obama Slams Republicans Over Lawsuit House Leaders Trade Blame for Inaction Malaysian PM: Stop Fighting in Ukraine Cantor Warns of Instability, Terror in Farewell Ravens' Ray Rice: 'I Made a Huge Mistake' Florida Panther Rebound Upsets Ranchers Small Plane Crash in San Diego Parking Lot Busy Franco's Not Afraid of Overexposure Fighting Blocks Access to Ukraine Crash Site Dangerous Bacteria Kills One in Florida Workers Dig for Survivors After India Landslide Texas Scientists Study Ebola Virus Smartphone Powered Paper Plane Debuts at Airshow Southern Accent Reduction Class Cancelled in TN
Hyperlocal Search
Premier Guide
Find a business

Walking Fingers
Maps, Menus, Store hours, Coupons, and more...
Premier Guide
Weather Radar
2014 Readers' Choice
Graduation 2014