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A deadly fungus is attacking frogs’ skin and wiping out hundreds of species worldwide. Can anyone help California's remaining mountain yellow-legged frogs? In a last-ditch effort, scientists are trying something new: build defenses against the fungus through a kind of frog “vaccine.”
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Chytrid fungus has decimated some 200 amphibian species around the world, among them the mountain yellow-legged frogs of California’s Sierra Nevada mountain range.
Frogs need healthy skin to survive. They breathe and drink water through it, and absorb the sodium and potassium their hearts need to work.
In the late 1970s, chytrid fungus started getting into mountain yellow-legged frogs through their skin, moving through the water in their alpine lakes, or passed on by other frogs. The fungus destroys frogs’ skin to the point where they can no longer absorb sodium and potassium. Eventually, they die.
At the University of California, Santa Barbara, biologists Cherie Briggs and Mary Toothman did an experiment to see if they could save mountain yellow-legged frogs by immunizing them against chytrid fungus.
They grew some frogs from eggs. Then they infected them with chytrid fungus. The frogs got sick. Their skin sloughed off, as happens typically to infected frogs. But before the fungus could kill the frogs, the researchers treated them with a liquid antifungal that stopped the disease.
When the frogs were nice and healthy again, researchers re-infected them with chytrid fungus. They found that all 20 frogs they had immunized survived. Now the San Francisco and Oakland zoos are replicating the experiment and returning dozens of mountain-yellow legged frogs to the Sierra Nevada’s alpine lakes.
--- How does chytrid fungus kill frogs?
Spores of chytrid fungus burrow down into frogs’ skin, which gets irritated. They run out of energy. Sick frogs’ legs lock in the straight position when they try to hop. As they get sicker, their skin sloughs off in translucent sheets. The frogs can no longer absorb sodium and potassium their hearts needs to function. “It takes 2-3 weeks for a yellow-legged frog to die from chytridiomycosis,” said mountain yellow-legged frog expert Vance Vredenburg , of San Francisco State University. “Eventually they die from a heart attack.”
--- How does chytrid fungus spread?
Fungus spores, which have a little tail called a flagellum, swim through the water and attack a frog’s skin. The fungus can also get passed on from amphibian to amphibian.
---+ Read the entire article on KQED Science:
https://ww2.kqed.org/science/2....016/09/06/can-a-new-
---+ For more information:
AmphibiaWeb
http://www.amphibiaweb.org/chy....trid/chytridiomycosi
---+ More Great Deep Look episodes:
These Crazy Cute Baby Turtles Want Their Lake Back
https://www.youtube.com/watch?v=YTYFdpNpkMY
Newt Sex: Buff Males! Writhing Females! Cannibalism!
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Sticky. Stretchy. Waterproof. The Amazing Underwater Tape of the Caddisfly
https://www.youtube.com/watch?v=Z3BHrzDHoYo
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It’s Okay To Be Smart: Do Plants Think?
https://www.youtube.com/watch?v=zm6zfHzvqX4
Gross Science: Why Get Your Tetanus Shot?
https://www.youtube.com/watch?v=O4jrqj5Dr8s
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Funding for Deep Look is provided in part by PBS Digital Studios and the John S. and James L. Knight Foundation. Deep Look is a project of KQED Science, which is also supported by HopeLab, the S. D. Bechtel, Jr. Foundation, the Dirk and Charlene Kabcenell Foundation, the Vadasz Family Foundation, the Gordon and Betty Moore Foundation, the Smart Family Foundation and the members of KQED.
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Giant Malaysian leaf insects stay still – very still – on their host plants to avoid hungry predators. But as they grow up, they can't get lazy with their camouflage. They change – and even dance – to blend in with the ever-shifting foliage.
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---
You’ll have to look closely to spot a giant Malaysian leaf insect when it’s nibbling on the leaves of a guava or mango tree. These herbivores blend in seamlessly with their surroundings because they look exactly like their favorite food: fruit leaves.
But you can definitely see these fascinating creatures at the California Academy of Sciences, located in the heart of San Francisco's Golden Gate Park, through the spring of 2022.
An ongoing interactive exhibit, ‘Color of Life,’ explores the role of color in the natural world. It's filled with a variety of critters, including Gouldian finches, green tree pythons, Riggenbach's reed frogs, and of course, giant leaf insects.
---+ Read the entire article on KQED Science:
https://www.kqed.org/science/1....947830/these-giant-l
--- What do giant leaf insects eat?
They’re herbivores, so they stick to eating leaves from their habitats, like guava and mango.
--- What’s one main difference between male and female giant leaf insects?
Males can actually fly as they have wings, which they use for mating.
--- But did you know that females don’t need males for mating?
They are facultatively parthenogenetic, which means they sometimes mate or sometimes reproduce asexually. If they mate with a male, they produce both males and females, but if the eggs remain unfertilized – only females are produced.
---+ For more information:
Visit California Academy of Sciences
https://calacademy.org/
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Sylly
Jim Spencer
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GOT7 HOT7 THOT7 VISUAL7
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Peregrine falcons catch other birds mid-flight by diving at more than 200 mph. To do it, they need some high-precision gear: special eyesight, talons and aerodynamics that can't be beat.
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---
While known for being the world’s fastest bird–peregrines have been clocked at diving more than 200 miles per hour–these majestic birds were at risk for going extinct 50 years ago. Widespread use of pesticides such as DDT decimated native populations of peregrine falcons.
By 1970, California’s peregrine population had dwindled to only two known nesting pairs statewide. The federal government banned DDT in 1972. And successful restoration efforts spearheaded by organizations like The Peregrine Fund helped revive their numbers. By 1999, they were removed from the federal Endangered Species List. Recent surveys estimate that there are now 300 to 350 nesting pairs in California and more than 2400 pairs nationwide.
---+ Read the entire article on KQED Science:
https://www.kqed.org/science/1....944037/peregrine-fal
--- What’s the origin of the Peregrine Falcon's name?
Peregrine is Latin for "Peregrinus," which means “traveler” or “pilgrim.”
--- How many eyelids do raptors, or birds or prey, like peregrine falcons have?
They have three! Two eyelids are used for closing their eyes, while the third is used for blinking. It’s also called the nictitating membrane and helps to protect their eyes and keep them moist and clean. It’s semi-transparent, so they can actually still see through it when it’s closed.
--- Did you know they have a special bone to protect their eyes?
It’s called a sclerotic ring and helps support and secure their eyeballs within their skulls.
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Watch this cartoon movie and solve funny puzzles at the same time!
Perfect for children who like Cut the Rope universe and toons!
Spot the difference between two shots during the cartoon and share your findings in comments!
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Salmon make a perilous voyage upstream past hungry eagles and bears to mate in forest creeks. When the salmon die, a new journey begins – with maggots.
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For salmon lovers in California, October is “the peak of the return” when hundreds of thousands of Chinook salmon leave the open ocean and swim back to their ancestral streams to spawn and die. All along the Pacific coast, starting in the early summer and stretching as late as December, salmon wait offshore for the right timing to complete their journey inland.
In Alaska, the season starts in late June, when salmon head to streams in lush coastal forests. Although this annual migration is welcomed by fishermen who catch the salmon offshore, scientists are finding a much broader and holistic function of the spawning salmon: feeding the forest.
Millions of salmon make this migratory journey -- called running -- every year, and their silvery bodies all but obscure the rivers they pass through. This throng of salmon flesh coming into Alaska’s forests is a mass movement of nutrients from the salt waters of the ocean to the forest floor. Decomposing salmon on the sides of streams not only fertilize the soil beneath them, they also provide the base of a complex food web that depends upon them.
--- Why Do Salmon Swim Upstream?
Salmon run up freshwater streams and rivers to mate. A female salmon will dig a depression in the gravel with her tails and then deposit her eggs in the hole. Male salmon swim alongside the female and release a cloud of sperm at the same. The eggs are fertilized in the running water as the female buries them under a layer of gravel.
When the eggs hatch, they spend the first part of their lives hunting and growing in their home stream before heading out to sea to spend their adulthood.
--- Why Do Salmon Die After Mating?
Salmon typically mate once and then die, though some may return to the sea and come back to mate the subsequent year. Salmon put all of their energy into mating instead of maintaining the salmon’s body for the future. This is a type of mating strategy where adults die after a single mating episode is called semelparity.
---+ Read the entire article on KQED Science:
https://ww2.kqed.org/science/2....017/09/26/theres-som
---+ For more information:
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These Fish Are All About Sex on the Beach | Deep Look
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Tekton es un canal de noticias católicas nacido en Barcelona (España), puedes encontrar noticias relacionadas con la Iglesia Católica, y recursos de otro tipo como vidas de Santos, el Evangelio del día, y otras muchas cosas más. No dudes en entrar y ver el contenido que sin duda te gustará, nuestra web es www.tekton.info
Qué es lo que sucede en el Purgatorio revelado a Sor María de La Cruz
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Tekton es un canal de youtube católico nacido en Barcelona (España), puedes encontrar noticias relacionadas con la Iglesia Católica, y recursos de otro tipo como formación católica, oraciones, música católica, vídeos del Papa Francisco, curiosidades, vidas de Santos, el Evangelio del día, y otras muchas cosas más. No dudes en entrar y ver el contenido que sin duda te gustará
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El demonio odia a los cristianos que hacen adoración eucarística
Tekton es un canal de youtube católico nacido en Barcelona (España), puedes encontrar noticias relacionadas con la Iglesia Católica, y recursos de otro tipo como formación católica, oraciones, música católica, vídeos del Papa Francisco, curiosidades, vidas de Santos, el Evangelio del día, y otras muchas cosas más. No dudes en entrar y ver el contenido que sin duda te gustará
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Om Nom Stories: FOOTBALL MATCH | Learn Colors with Colorful Soccer Balls for Kids by Om Nom
Om Nom along with his best friend Om Nelle are now entering the magical world of learning where every day they learn something new about shapes, colors, numbers and more! Come along kids and join your ever favorite #OmNom in this new and exclusive #cartoon collection of #LearningWithOmNom!
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This video is aimed more at our youngest audience. Learning colors has never been more fun!
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Presentan firmas contra Netflix por película blasfema que ofende a cristianos
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Tekton es un canal de youtube católico nacido en Barcelona (España), puedes encontrar noticias relacionadas con la Iglesia Católica, y recursos de otro tipo como formación católica, oraciones, música católica, vídeos del Papa Francisco, curiosidades, vidas de Santos, el Evangelio del día, y otras muchas cosas más. No dudes en entrar y ver el contenido que sin duda te gustará
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Las Profecías del Fin del Mundo por el Ángel del Apocalipsis
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Tekton es un canal de youtube católico nacido en Barcelona (España), puedes encontrar noticias relacionadas con la Iglesia Católica, y recursos de otro tipo como formación católica, oraciones, música católica, vídeos del Papa Francisco, curiosidades, vidas de Santos, el Evangelio del día, y otras muchas cosas más. No dudes en entrar y ver el contenido que sin duda te gustará
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Lo que algunos científicos no quieren que sepas, Dios si existe
Tekton es un canal de youtube católico nacido en Barcelona (España), puedes encontrar noticias relacionadas con la Iglesia Católica, y recursos de otro tipo como formación católica, oraciones, música católica, vídeos del Papa Francisco, curiosidades, vidas de Santos, el Evangelio del día, y otras muchas cosas más. No dudes en entrar y ver el contenido que sin duda te gustará
Twitter de Marcos Vera: https://twitter.com/MarcosVeraPrez1
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#CanalCatolicoYouTube
These aren't your ordinary garden snails. Tiny cone snails may boast delicate and gorgeous shells, but they pack a powerful—and lethal—punch. The snails' venom can be fatal to various fish and even humans.
But it could also offer a potential cure.
Mandë Holford, a biochemist at Hunter College and the American Museum of Natural History, works with a team to investigate the snails' venom and look for compounds that could be used to treat pain and cancer. Ancient cultures have traditionally used their natural environment to look for cures for the things that ail them, she explains. Now, researchers are investigating how "nature's deadliest cocktail" could create new pathways for treating old problems.
A film by Science Friday
Produced in collaboration with the Howard Hughes Medical Institute
Produced by Emily V. Driscoll and Luke Groskin
Directed and Edited by Emily V. Driscoll
Filmed by Christian Baker and Dusty Hulet
Animations by M. Gail Rudakewich and Luke Groskin
Music by Audio Network
Additional Photos and Video by
Olivera Lab, Shutterstock, Pond5, NatureFootage, BioPixel, iBiology, Mandë Holford, Gregory S. Herbert
Guillaume van den Bossche, The National Library of Medicine
Project Advisors:
Laura A. Helft, Laura Bonetta, Dennis W.C. Liu and Sean B. Carroll - Howard Hughes Medical Institute
Special Thanks to
American Museum of Natural History, Hunter College, Olivera Lab at the University of Utah
Baldomero "Toto" Olivera, Talia Amador, Devin Callahan, Sean Christensen, Mandë Holford
Gregory S. Herbert, My Huynh, Terry Merritt, Aubrey Miller, Kendra Snyder, Danielle Dana,
Chistian Skotte, Ariel Zych and Jennifer Fenwick
Science Friday/HHMI © 2017
El obispo Fulton Sheen será beatificado tras extraordinaria curación por su intercesion
TEKTON NECESITA TU APOYO PARA CONTINUAR CON SU LABOR APOSTÓLICA Y CARITATIVA, SI PUEDES HACERNOS UN DONATIVO TIENES DOS FORMAS:
HAZTE PATROCINADOR: https://www.patreon.com/CTtekton
DONATIVO A TRAVÉS DE LA WEB: https://www.tekton.info/hacer-caridad/
OTRAS REDES SOCIALES
Web: https://www.tekton.info/
San José de tekton: https://www.youtube.com/channe....l/UCEy0tevPx3RayM5PA
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Tekton es un canal de youtube católico nacido en Barcelona (España), puedes encontrar noticias relacionadas con la Iglesia Católica, y recursos de otro tipo como formación católica, oraciones, música católica, vídeos del Papa Francisco, curiosidades, vidas de Santos, el Evangelio del día, y otras muchas cosas más. No dudes en entrar y ver el contenido que sin duda te gustará
Instagram de Marcos Vera: https://www.instagram.com/marcosveraperez/
Twitter de Marcos Vera: https://twitter.com/MarcosVeraPrez1
Twitter de Jesus Sellas: https://twitter.com/JesusSellas
Hacer un donativo: https://www.tekton.info/hacer-caridad/
Tienda de merchandising de Tekton: https://teespring.com/stores/t....ekton-centro-televis
Web: http://www.tekton.info
Facebook: https://www.facebook.com/productoratekton/
Twitter: https://twitter.com/productoratekto?s=09
Instagram: https://www.instagram.com/productoratekton/
Google+: https://plus.google.com/u/1/+T....ektonTekton?hl=es-41
#Tekton
#TektonCentroTelevisivo
#TektonYouTube
#CanalCatolicoYouTube
A mystery of the animal kingdom: How do owls turn their heads 270 degrees without damaging their blood vessels? At last an answer, published this week in Science, as the winning poster in the 2012 International Science & Engineering Visualization Challenge. Fabian de Kok-Mercado, of Howard Hughes Medical Institute, and Philippe Gailloud, of the Johns Hopkins University School of Medicine, dissected and X-rayed owls to discover how the birds do the twist.
Lo que debes saber sobre Martín Lutero y los falsos reformadores
TEKTON NECESITA TU APOYO PARA CONTINUAR CON SU LABOR APOSTÓLICA Y CARITATIVA, SI PUEDES HACERNOS UN DONATIVO TIENES DOS FORMAS:
HAZTE PATROCINADOR: https://www.patreon.com/CTtekton
DONATIVO A TRAVÉS DE LA WEB: https://www.tekton.info/hacer-caridad/
OTRAS REDES SOCIALES
Web: https://www.tekton.info/
San José de tekton: https://www.youtube.com/channe....l/UCEy0tevPx3RayM5PA
Instagram Tekton: https://www.instagram.com/prod....uctoratekton/?hl=es-
Instagram Marcos: https://www.instagram.com/marcosveraperez/?hl=es
Twitter: https://twitter.com/productoratekto
Twitter Marcos: https://twitter.com/marcosveraprez1?lang=es
Tekton es un canal de youtube católico nacido en Barcelona (España), puedes encontrar noticias relacionadas con la Iglesia Católica, y recursos de otro tipo como formación católica, oraciones, música católica, vídeos del Papa Francisco, curiosidades, vidas de Santos, el Evangelio del día, y otras muchas cosas más. No dudes en entrar y ver el contenido que sin duda te gustará
Instagram de Marcos Vera: https://www.instagram.com/marcosveraperez/
Twitter de Marcos Vera: https://twitter.com/MarcosVeraPrez1
Twitter de Jesus Sellas: https://twitter.com/JesusSellas
Hacer un donativo: https://www.tekton.info/hacer-caridad/
Tienda de merchandising de Tekton: https://teespring.com/stores/t....ekton-centro-televis
Web: http://www.tekton.info
Facebook: https://www.facebook.com/productoratekton/
Twitter: https://twitter.com/productoratekto?s=09
Instagram: https://www.instagram.com/productoratekton/
Google+: https://plus.google.com/u/1/+T....ektonTekton?hl=es-41
#Tekton
#TektonCentroTelevisivo
#TektonYouTube
#CanalCatolicoYouTube
3 formas equivocadas de recibir la Santa Eucaristía
Tekton es un canal de noticias católicas nacido en Barcelona (España), puedes encontrar noticias relacionadas con la Iglesia Católica, y recursos de otro tipo como vidas de Santos, el Evangelio del día, y otras muchas cosas más. No dudes en entrar y ver el contenido que sin duda te gustará, nuestra web es http://www.tekton.info
