Offbeat: Amazon fish wears nature's 'bullet-proof vest' to thwart piranhas - - PressFrom - Australia
  •   
  •   

Offbeat Amazon fish wears nature's 'bullet-proof vest' to thwart piranhas

13:23  17 october  2019
13:23  17 october  2019 Source:   reuters.com

Poll shows Brazilian Catholics do not agree with Bolsonaro on Amazon

  Poll shows Brazilian Catholics do not agree with Bolsonaro on Amazon Poll shows Brazilian Catholics do not agree with Bolsonaro on AmazonThe survey, published as Pope Francis opened the Amazon Synod at the Vatican, found that 7 in 10 Catholics in Brazil believe that preserving the Amazon is "very important" and 85% view attacking the Amazon forest as a sin.

of a " bullet - proof vest ," helping it thrive in the dangerous waters of the Amazon (NASDAQ:AMZN) River basin with flexible armor-like scales able to This structure means the scales can become deformed when bitten by a piranha but are not torn, broken or pierced, protecting the fish from injury.

One of the world' s largest freshwater fish is protected by the natural equivalent of a " bullet - proof vest ," helping it thrive in the dangerous waters of the Amazon River basin with flexible armor-like scales able to withstand ferocious piranha attacks. Researchers from the University of.

Student creates disturbing tool that projects another person's face on to your own as a way to thwart facial recognition software

  Student creates disturbing tool that projects another person's face on to your own as a way to thwart facial recognition software As facial recognition software has developed in accuracy and reach, new tools for resisting are capturing the public imagination, including this disturbing art project from a Utrecht student.The mysterious device shows a headband with a large digital projector, which projects a digital image of another person's face onto whoever is wearing the device.

The fish , also known as pirarucu, gets up to 10 feet (3 meters) long and weighs up to 440 pounds (200 kg). Arapaima, a fish that can breathe air and survive up to a day outside of the water, inhabits rivers in Brazil, Guyana and Peru infested with piranhas , known for razor-sharp teeth, incredible bite strength

Science: Amazon fish wears nature ' s ' bullet - proof vest ' to thwart piranhas . Health: Teva to donate over billion worth of drugs in opioid settlement: source.

WASHINGTON (Reuters) - One of the world's largest freshwater fish is protected by the natural equivalent of a "bullet-proof vest," helping it thrive in the dangerous waters of the Amazon River basin with flexible armor-like scales able to withstand ferocious piranha attacks.

Researchers from the University of California, San Diego and University of California, Berkeley on Wednesday described the unique structure and impressive properties of the dermal armor of the fish, called Arapaima gigas. They said their findings can help guide development of better body armor for people as well as applications in aerospace design.

The fish, also known as pirarucu, gets up to 10 feet (3 meters) long and weighs up to 440 pounds (200 kg). Arapaima, a fish that can breathe air and survive up to a day outside of the water, inhabits rivers in Brazil, Guyana and Peru infested with piranhas, known for razor-sharp teeth, incredible bite strength and deadly feeding frenzies.

Amazon Music is coming to Apple TV. Here's how to set it up

  Amazon Music is coming to Apple TV. Here's how to set it up The new app brings access to 50 million songs.Amazon Music customers "should be able to stream music simply and easily on any device they choose," said Karolina Joynathsing, director of business development for Amazon Music.

Science: Amazon fish wears nature ' s ' bullet - proof vest ' to thwart piranhas . Health: Teva to donate over billion worth of drugs in opioid settlement: source.

Science: Amazon fish wears nature ' s ' bullet - proof vest ' to thwart piranhas . Health: Teva to donate over billion worth of drugs in opioid settlement: source.

There long has been an evolutionary arms race in which predators develop ways to kill - like sharp teeth - and other animals develop ways to stay alive like the dermal armor seen in various fish, dinosaurs and mammals over time. Arapaima's scales, the researchers said, possess all the best attributes of a bullet-proof vest, but the elements are better integrated into one solid piece combining imperviousness and flexibility.

"Such lightweight and tough materials like fish scales are the sexy topics that materials scientists are pursuing," said Wen Yang, a UCSD materials scientist who helped lead the study published in the journal Matter.

Related Slideshow: Facts about the Amazon rainforest (provided by Photo Services)

"It is true that the natural armor is similar to artificial body armor because of the similar scale overlapping system. However, the natural armor such as these fish scales is tough and much lighter, without impeding body flexibility and locomotion," Yang added. "Remember that the fish scales were developed through hundreds of millions of years. They are very advanced."

The researchers conducted laboratory tests of the scales.

The scales, they found, have a hard mineralized outer layer to resist penetration that is bound to a tough-but-flexible inner layer by collagen – the main structural protein in skin and other connective tissues in the body.

This structure means the scales can become deformed when bitten by a piranha but are not torn, broken or pierced, protecting the fish from injury.

"We were able to see how the collagen fibers deform without a catastrophic failure including the mechanisms of twisting, folding, sliding, stretching, delamination," Yang said.

The study was backed by the U.S. Air Force Office of Scientific Research.

Piranha teeth are even more incredible than we thought .
Piranha fish are incredible animals that have gotten a bit of a bad reputation over the years. Though relatively small, the fish sport jaws lined with incredibly sharp teeth that they can use to tear flesh from bone. The fish, which are actually omnivores and not strict carnivores, don’t often mess with humans, but there’s no denying that their fearsome bite makes them a threat, especially if food is scarce. Now, a new study published in Evolution & Development reveals that the teeth of various piranha species are even more unique than scientists first realized. The fish, it seems, are basically tiny tooth factories.

—   Share news in the SOC. Networks

Topical videos:

usr: 6
This is interesting!