Top Vídeos
Besides being hermaphrodites — all snails have both boy and girl parts — they stab each other with “love darts” as a kind of foreplay.
SURVEY LINK: http://surveymonkey.com/r/pbsds2017
SUBSCRIBE to Deep Look! http://goo.gl/8NwXqt
DEEP LOOK: a new ultra-HD (4K) short video series created by KQED San Francisco and presented by PBS Digital Studios. See the unseen at the very edge of our visible world. Get a new perspective on our place in the universe and meet extraordinary new friends. Explore big scientific mysteries by going incredibly small.
The sex life of the common snail is anything but ordinary.
First, they’re hermaphrodites, fitted with both male and female reproductive plumbing, and can mate with any member of their species they want.
Sounds easy, but the battle of the sexes is alive and well in gastropods.
In nature, fatherhood is easier. It’s the quickest, cheapest way to pass on your genes. Motherhood requires a much greater investment of time, energy, and resources.
During courtship, the snails will decide who gets to be more father than mother. But their idea of courtship is to stab each other with a tiny spike called a love dart.
The love dart is the snails’ tool for maximizing their male side. It injects hormones to prevent the other snail’s body from killing newly introduced sperm once copulation begins.
When snails copulate, two penises enter two vaginal tracts. Both snails in the pairing transfer sperm, but whichever snail got in the best shot with the dart has a better chance of ultimately fertilizing eggs.
In some species, only one snail fires a love dart, but in others, like the garden snail, both do.
You can spot love darts sticking out of snails in mid-courtship, and even find them abandoned in slime puddles where mating has been happening.
Scale it up to human size and the love dart would be the equivalent of a 15-inch knife.
--- How common is hermaphroditism?
Less than one percent of animal species are hermaphrodites. They’re most common among arthropods, the phylum of life that includes snails.
--- How do hermaphrodites decide who’s going to the male and female?
In most cases, both individuals will be both male and female, to some extent. Sometimes, like with garden snails, it’s a question of degree.
--- Can a love dart kill the snail?
In theory yes, but not very often. One researcher told us that in the thousands of matings he’s observed, he’s seen only one snail die that way.
---+ Read the entire article on KQED Science:
https://ww2.kqed.org/science/2....017/03/14/everything
---+ For more information:
Visit Joris Koene’s site. He’s one of the world’s foremost snail and slug researchers: http://www.joriskoene.com/
---+ More Great Deep Look episodes:
Banana Slugs: Secret of the Slime
https://www.youtube.com/watch?v=mHvCQSGanJg
The Ladybug Love-In: A Valentine's Special
https://www.youtube.com/watch?v=c-Z6xRexbIU
---+ See some great videos and documentaries from the PBS Digital Studios!
Gross Science: Help a Snail Find True Love!
https://www.youtube.com/watch?v=Vfkb2XyswJY
4 Valentine's Day Tips From the Animal World!
https://www.youtube.com/watch?v=5lMa9CYG3SU
---+ Follow KQED Science:
KQED Science: http://www.kqed.org/science
Tumblr: http://kqedscience.tumblr.com
Twitter: https://www.twitter.com/kqedscience
---+ About KQED
KQED, an NPR and PBS affiliate in San Francisco, CA, serves Northern California and beyond with a public-supported alternative to commercial TV, Radio and web media.
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. education
#deeplook
Tracklist
A1 Yesterday 2:13
A2 Africa (L’été indien) 4:00
A3 Michelle 2:28
A4 La Bohême 3:36
A5 Quand un bateau passe 3:20
A6 J’aime 2:26
B1 Aline 2:25
B2 Le Sud 3:22
B3 Manuela 3:18
B4 Le Ciel, le Soleil et la Mer 2:20
B5 Capri, c’est fini 3:40
B6 Mon Cœur d’attache 2:38
Desde el 23 de enero, Wuhan, epicentro del Covid-19 permanece en una cuarentena severa. Se han cerrado el aeropuerto internacional, las estaciones de tren y servicios de autobús.
Pero no es la única ciudad clausurada. Para finales de enero, las autoridades extendieron las restricciones de transporte y movimiento al menos a otras 15 ciudades de la provincia de Hubei. En conjunto, alrededor de 57 millones de personas fueron afectados por esta cuarentena que ya dura más de un mes. Como si se hubiera puesto en cuarentena a todo Italia o Corea del Sur.
Pero en Wuhan, el gran foco del coronavirus, las medidas han alcanzado niveles de ciencia ficción.
Es ya la mayor cuarentena de la historia de la humanidad. Y tras más de un mes, las preguntas se acumulan. ¿Cómo se impone a ese nivel? ¿Es eficaz? ¿Cuánto lo podrá soportar la población?
#covid19 #cuarentena #coronavirus
Suscríbete y sigue nuestros videos: https://goo.gl/AEQHst
Toda la información en: http://www.elconfidencial.com
Más vídeos en: https://www.elconfidencial.com/multim...
Y por supuesto en:
Twitter: https://twitter.com/elconfidencial
Facebook: https://www.facebook.com/elconfidencial/
Instagram: https://www.instagram.com/elconfidencial
En esta historia de la Biblia, podrás saber mucho más acerca de Pedro, el discípulo de Jesús!
No olvides suscribirte haciendo clic aquí! http://bit.ly/ph-suscribete
¡Comparte con Pequeños Héroes y aprende!
Más videos de Pequeños Héroes:
Historias de la Biblia para niños: http://bit.ly/2IjLSwk
Pequeños Héroes – La Serie: http://bit.ly/ph-laserie
Canciones infantiles: http://bit.ly/ph-canciones
Conoce más de Pequeños Héroes en:
Sitio WEB: http://pequenosheroes.com
Blog: http://pequenosheroes.com/blog/
Curriculum en: http://bit.ly/ph-curriculum-es
Recibe Info en: http://bit.ly/ph-infonews1
Sigue a Pequeños Héroes en:
Facebook: http://bit.ly/ph-facebook-f
Instagram: http://bit.ly/ph-instagram-f
YouTube: http://bit.ly/ph-youtube-ch
#PequeñosHéroes #HistoriasDeLaBibliaParaNiños #BibliaParaNiños
Suscríbete al canal: http://smarturl.it/RomeReportsESP
Visita nuestra web: http://www.romereports.com/es
Suscríbete a nuestra newsletter: http://bit.ly/1RLUQBz
En la ceremonia de 'Recognitio' se retiraron documentos guardados desde el Jubileo del 2000.
---------------------
Para difusión del vídeo: sales@romereports.com
ROME REPORTS es una Agencia de Noticias para TV, internacional e independiente, especializada en la actividad del Papa, la vida del Vaticano y los debates de actualidad sobre temas sociales, culturales o religiosos. Informar sobre la Iglesia Católica requiere cercanía a las fuentes, conocimiento en profundidad de la Institución, y elevados niveles de creatividad y competencia técnica.
ROME REPORTS informa directamente al público y cubre las necesidades de las emisoras mediante noticias diarias, programas informativos semanales y documentales especializados.
---------------------
Visítanos en...
Nuestra WEB http://es.romereports.com/
FACEBOOK https://www.facebook.com/RomeReportsESP
TWITTER https://twitter.com/romereports
Suscríbete A Nuestro Canal Aquí
Captain Marvel Trailer - Easter Eggs & Details You Missed! What cryptic clues are hidden in the new trailer for Captain Marvel (2019), with Carol Danvers (Brie Larson) and a young Nick Fury (Samuel L Jackson)? Who are the Kree and the Skrull, and which of them are the true villains of this movie? What secret is Annette Bening's character hiding? Erik Voss breaks down this Captain Marvel movie trailer shot by shot for all the interesting visual details you might have missed! Did the Kree implant false memories in Carol Danvers' mind, and is Carol's witnessing of her crash site accident fake? What character is Jude Law playing? What is so special about Captain Marvel's cat, and what DARK TURN could he take in this movie?
CONNECT WITH US!
Facebook: http://facebook.com/newmediarockstars
Twitter: http://twitter.com/newrockstars
CONNECT WITH ERIK:
http://www.twitter.com/eavoss
SPECIAL THANKS TO OUR PATREON SUPPORTERS (http://www.patreon.com/newrockstars), including these beautiful people:
Kelly Hopper
Kenny Smith
Matthew Salvas
Pony Stark
Wilhelmina Ebbeson
Rose Bellandi
Chelsea Kerr
Edward Laau
TJ Smith
Lori Denning
Alan Fleming
Mike Kotselec
CaroleBDCDiva
John Semander
Jason McCauley
Guy Guy
Anastasia Paulson
Executive Creative Director: Filup Molina http://www.twitter.com/fimo
Post Production Supervisor: Devin Cleary
Editors: Joshua Hurd, Devin Cleary, Aaron Carrión
Music: "Sci Fi" from Bensound.com
Oso Yogi - 06.- El pequeño Valiente
La princesa Sofía ya ha llegado al reino. Una niña que se conviertió, una película realmente mágina. Ahora que Sofía está en palacio ya nada volverá a ser lo mismo. Es hora de convertirse en princesa.
Suscríbete al canal de Disney Junior Youtube Oficial http://bit.ly/1lZqZIe.
¿Quieres que tu hij@ se divierta con sus personajes favoritos? ¡Hazte con la
My drawing book: http://amzn.to/1K7L8Ed
Visit me on FB: https://www.facebook.com/LeonardoPereznieto
My website: http://www.ArtistLeonardo.com/
Do you want to help me translating it into your language?
(Note: First check if it hasn´t been translated already by pressing the "CC" button on the lower part of the video).
All you need to do is to please go to the following link and translate. Thank you!:
http://www.youtube.com/timedte....xt_video?v=hagEiv-vv
If you would like to invest in a drawing, painting or sculpture by Leonardo Pereznieto, or to hire him for workshops or lectures, please write to: info@artistleonardo.com (Business only, not for personal messages.)
List of materials:
Mechanical pencil with 0.7mm, B lead
Mechanical pencil with 0.3mm, 2H lead
Lead Holder with 2mm lead, 3H
Kneaded eraser Prismacolor
MagicRub FaberCastell eraser
Fabriano white drawing paper, fine grain
If you would like to see photos and brands of my tools, please go to my blog about materials with the following link:
http://fineart-tips.blogspot.m....x/2015/07/my-drawing
You may also follow me on:
My Blog: http://fineart-tips.blogspot.mx/
My Twitter: https://twitter.com/#!/ArtistLeonardo
Fine Art Tips on Google+: http://goo.gl/TqsmiJ
My Google+ page as an artist (with my sculptures, paintings, etc): https://plus.google.com/+Artistleonardo/posts
My Instagram: http://instagram.com/artistleonardo
My LinkedIn: http://www.linkedin.com/profile/view?id=89957576&trk=tab_pro
My Vine: https://vine.co/v/hKnn3rbwJmT
My Pinterest: http://pinterest.com/ArtistLeonardo/
My VK: http://vk.com/leonardopereznieto
My website Leonardo Pereznieto: http://www.leonardopereznieto.com/leo/Intro.html
I wish you great creations!
Audio file(s) provided by http://www.audiomicro.com
This tutorial shows How to Draw a Woman in Profile - Hummingbird Girl
El Capitán Topa te invita a vivir 5 momentos en tu monorriel favorito. Un paseo por 5 situaciones de una tripulación muy divertida. Sigue mirando Junior Express en Disney Junior.
Sitio Oficial: http://www.disneylatino.com/disneyjunior/
Síguenos en Facebook: http://www.facebook.com/DisneyJuniorLatinoamerica
¡Haz click en el botón SUSCRIBIR y entérate de los nuevos videos de Disney Junior en Youtube!
Este es el número clave que cambia la crisis del coronavirus para todos.
La R hace referencia al número básico de reproducción, o tasa de transmisión, de un virus, y el 1 indica que una persona, de media, solo infecta a otra o menos. Y en el caso del Covid-19 llegar a ese "1" supone aplanar la tan famosa curva epidemiológica y hacer compatible el virus con el sistema sanitario disponible.
Y mientras no tengamos una vacuna disponible, lo que no se espera que llegue antes de finales de 2021, la única solución para alcanzar y mantener la tasa de transmisión por debajo de 1 será, según casi todos los expertos, limitando el contacto físico entre personas tras el fin de los confinamientos masivos, lo que se conoce como distanciamiento físico o social. Pero, ¿cómo será? Y, sobre todo, ¿cuánto durará?
#coronavirus #cuarentena #distanciamientosocial
Más explicativos del CORONAVIRUS: https://www.youtube.com/playli....st?list=PL1hLvXWwzy1
Otros temas en OBSERVATORIO: https://www.youtube.com/playli....st?list=PL1hLvXWwzy1
Y también en nuestra lista GEO: https://www.youtube.com/playli....st?list=PL1hLvXWwzy1
SUSCRÍBETE a nuestro canal aquí: https://www.youtube.com/channe....l/UCY2hu_NT5NDbBU-HG
![Guía LIMBO [Capitulo 1-4]](https://i.ytimg.com/vi/iEF1vPAMELQ/maxresdefault.jpg)
-------------------------------------------------ÁBREME------------------------------------------------------------
Sígueme en twitter: https://twitter.com/wineMFN
---------------------------------------------------------------------------------------------------------------------------
El personaje principal de Limbo es un chico (al que no se le da nombre) que despierta en medio de un bosque en el "borde del infierno" (el título del juego viene del Latín limbus, que significa "borde") y que en ese momento empieza a buscar a su hermana perdida.
El jugador controla al personaje por la totalidad de Limbo. Al igual que en la mayoría de juegos de plataformas de dos dimensiones, el jugador puede hacer correr al personaje en las dos direcciones, saltar, subir por salientes, subir y bajar cuerdas, y empujar o estirar objetos según necesite en función de la situación. El juego se nos presenta con unos gráficos oscuros, en escala de grises, y con unos efectos de sonido minimalistas, creando así un ambiente misterioso e inquietante.
? SUSCRIBETE AQUÍ: https://goo.gl/mDu2Ad
? Aplicación Campanita de Bebe milo: https://bit.ly/2GKkqHH
? Contacto: bebemilocontacto@gmail.com
✅ Canales de los #AMIWITOS
Vita: https://goo.gl/53Qtpv
Timo: https://goo.gl/rGEwgK
Adri: https://goo.gl/qBMQzu
✅ Aplicación Bebe Milo Aventuras ? https://goo.gl/PzZEuv
✅ Juega en Bebe Milo Server: https://goo.gl/Wrx3ih
? Redes sociales de Bebe Milo:
? Instagram: https://www.instagram.com/bebemiloyt/
? Twitter: https://twitter.com/BebeMiloYT
? Facebook: https://www.facebook.com/bebemiloyt
======================================================
? MIS LISTAS DE REPRODUCCIÓN
✅ LO MEJOR de BEBE MILO y sus AMIGOS: https://goo.gl/9MgnWZ
✅ BEBE MILO AVENTURAS: https://goo.gl/VQhwNq
✅ LAS AVENTURAS DEL NOOB: https://goo.gl/gP8lwG
✅ CANCIONES DE BEBE MILO: https://goo.gl/swgdwg
✅ EL ESCONDITE: https://goo.gl/45L2yT
✅ ISLA VS ISLA: https://goo.gl/euAmDc
✅ BEBE MILO DIMENSIONES: https://goo.gl/rHVcU2
======================================================
El canal de Bebe milo es para publico infantil. Podrás encontrar canciones infantiles, música infantil para niños y niñas, chicos y chicas. También podrás ver jugar juegos como minecraft gratis, roleplay muy entretenido y en español latino, roblox y mucho mas.
Lo importante es divertirse y tener lo mejor de minecraft para bebes en 2018!
Sure, the female black widow has a terrible reputation. But who’s the real victim here? Her male counterpart is a total jerk — and might just be getting what he deserves.
Learn more about CuriosityStream at http://curiositystream.com/deeplook
SUBSCRIBE to Deep Look! http://goo.gl/8NwXqt
DEEP LOOK: a new ultra-HD (4K) short video series created by KQED San Francisco and presented by PBS Digital Studios. See the unseen at the very edge of our visible world. Get a new perspective on our place in the universe and meet extraordinary new friends. Explore big scientific mysteries by going incredibly small.
We’ve all heard the stories. She mates and then kills. Her venom is 15 times stronger than a rattlesnake’s. One bite could kill you. With a shiny black color and a glaring red hourglass stomach, she has long inspired fear and awe.
But most species of widow spider (there are 31), including the western black widow found in the U.S., don’t kill their mates at all. Only two widow spider species always eat their mate, the Australian redback and the brown widow, an invasive species in California.
And the male seems to be asking for it. In both of these species, he offers himself to her, somersaulting into her mouth after copulation.
He may even deserve it. During peak mating season, thousands of males will prowl around looking for females. Females set up their webs, stay put and wait.
Once the male arrives at her silken abode, he starts to wreck it, systematically disassembling her web one strand at a time. In a process scientists call web reduction, he bunches it into a little ball and wraps it up with his own silk.
Then, while mating, he will wrap her in fine strands that researchers refer to as the bridal veil. He drapes his silk over her legs, where her smell receptors are most concentrated.
After all of that, he is most likely to crawl away, alive and unscathed.
--- Why does the black widow spider eat her mate?
No one really knows, but scientists assume his body supplies her with nutrition for laying eggs. Sometimes she eats him by accident, not recognizing him as a mate.
--- How harmful are black widows to people?
We couldn’t find a documented case of a human death from a black widow spider in the U.S., but a bite will make you sick with extreme flu-like symptoms. Luckily, black widows aren’t aggressive to people.
--- Why do black widows have a red hourglass?
It’s a warning sign, a phenomenon common in nature that scientists call aposematicism, which is the use of color to ward off enemies.
---+ Read the entire article on KQED Science:
https://ww2.kqed.org/science/2....018/01/09/why-the-ma
---+ For more information:
Black widow researcher Catherine Scott’s website: http://spiderbytes.org/
---+ More Great Deep Look episodes:
Why Is The Very Hungry Caterpillar So Dang Hungry?
https://www.youtube.com/watch?v=el_lPd2oFV4
Everything You Never Wanted to Know About Snail Sex
https://www.youtube.com/watch?v=UOcLaI44TXA
---+ See some great videos and documentaries from the PBS Digital Studios!
Origin of Everything: Why Does Santa Wear Red?
https://www.youtube.com/watch?v=fajNM5OPVnA
PBS Eons: 'Living Fossils' Aren't Really a Thing
https://www.youtube.com/watch?v=mPvZj2KcjAY
---+ Follow KQED Science:
KQED Science: http://www.kqed.org/science
Tumblr: http://kqedscience.tumblr.com
Twitter: https://www.twitter.com/kqedscience
---+ About KQED
KQED, an NPR and PBS affiliate based in San Francisco, serves the people of Northern California and beyond with a public-supported alternative to commercial media. Home to one of the most listened-to public radio station in the nation, one of the highest-rated public television services and an award-winning education program, KQED is also a leader and innovator in interactive media and technology, taking people of all ages on journeys of exploration — exposing them to new people, places and ideas.
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 supported by HopeLab, The David B. Gold Foundation; S. D. Bechtel, Jr. Foundation; The Dirk and Charlene Kabcenell Foundation; The Vadasz Family Foundation; Smart Family Foundation and the members of KQED.
#deeplook #blackwidow #spiders
La Organización Mundial de la Salud advierte que muchos están aprovechando el miedo del coronavirus para esparcir informaciones erróneas e incluso lucrar con productos contra la epidemia.
La mexicana Mayra Sandoval rechazó abortar a su hijo y dio su vida porque naciera
Somos una comunidad especializada en rescatar material del recuerdo.
Puedes disfrutar nuestros contenidos en:
Nuestra Web: https://www.generacionretro.net
Nuestro Twitter: https://twitter.com/gretrocool
Nuestro Facebook: http://www.facebook.com/generacionret...
Copyright Disclaimer Under Section 107 of the Copyright Act 1976, allowance is made for "fair use" for purposes such as criticism, comment, news reporting, teaching, scholarship, and research. Fair use is a use permitted by copyright statute that might otherwise be infringing. Non-profit, educational or personal use tips the balance in favor of fair use
