Here are our top five mating fights! From ibexes to elephant seals, watch as these species do battle to find a mate.
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Welcome to BBC EARTH! The world is an amazing place full of stories, beauty and natural wonder. Here you'll find 50 years worth of entertaining and thought-provoking natural history content. Dramatic, rare, and exclusive, nature doesn't get more exciting than this.

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There's a story in every grain of sand: tales of life and death, fire and water. If you scooped up a handful of sand from every beach, you'd have a history of the world sifting through your fingers.

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.

* NEW VIDEOS EVERY OTHER TUESDAY! *

---+ How does sand form?

Sand can be anything that has been worn down until it’s reduced to some tiny, essential fragment of what it once was: a granite pebble from the mountains; coral from the sea; obsidian from a volcano; even skeletons of microscopic sea animals. It's also a technical term. Bigger than sand, that’s gravel, smaller? Silt.

By studying the composition and texture of sand, geologists can reconstruct its incredible life history. “There’s just a ton of information out there, and all of it is in the sand,” said Mary McGann, a geologist at the United States Geological Survey in Menlo Park, CA.

McGann recently took part in a comprehensive research project mapping sand’s journey into and throughout San Francisco Bay.

Patrick Barnard, another USGS geologist who helped oversee the project, said that it will help scientists understand how local beaches are changing over time. In particular, Barnard wants to understand why beaches just south of San Francisco Bay are among the most rapidly eroding beaches in the state.

From 2010-2012, Barnard and his team sampled beaches, outcrops, rivers and creeks to track sand’s journey around the bay. They even collected sand from the ocean floor. The researchers then carefully analyzed the samples to characterize the shapes, sizes, and chemical properties of the sand grains.

Barnard said the information provides a kind of fingerprint, or signature, for each sample that can then be matched to a potential source. For example, certain minerals may only come from the Sierra Mountains or the Marin Headlands.

“If we’ve covered all of the potential sources, and we know the unique signature of the sand from these different sources, and we find it on a beach somewhere, then we basically know where it came from,” explained Barnard.

And those species aren’t the only things finding their way into the sand. Manmade materials can show up there, too. McGann has found metal welding scraps and tiny glass spheres (commonly sprinkled on highways to make road stripes reflective) in sand samples from around the bay.

“All of these things can get washed into our rivers or our creeks, or washed off the road in storm drains,” explained McGann. “Eventually they end up in, for example, San Francisco Bay.”

By piecing together all of these clues – the information found in the minerals, biological material and man made objects that make up sand – the researchers ended up with a pretty clear picture of how sand travels around San Francisco Bay.

Some sands stay close to home. Rocky sand in the Marin Headlands comes from nearby bluffs, never straying far from its source.

Other sands travel hundreds of miles. Granite from the Sierra Nevada mountains careens down rivers and streams on a century-long sojourn to the coast.

In fact, much of the sand in the Bay Area comes from the Sacramento and San Joaquin rivers, with local watersheds also playing an important role in transporting sand to the beach.

Although this project focused on San Francisco Bay, the same techniques could be used to study other coastal systems, he added, revealing the incredible life stories of sand from around the world.

---+ More Deep Look episodes:

What Happens When You Zap Coral With The World's Most Powerful X-ray Laser?
https://youtu.be/aXmCU6IYnsA

These 'Resurrection Plants' Spring Back to Life in Seconds
https://youtu.be/eoFGKlZMo2g

--
Full article: http://blogs.kqed.org/science/....2014/11/04/the-amazi

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---+ 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 David B. Gold Foundation, 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.
#deeplook

We're kicking off our exploration of muscles with a look at the complex and important relationship between actin and myosin. Your smooth, cardiac, and skeletal muscles create movement by contracting and releasing in a process called the sliding filament model. Your skeletal muscles are constructed like a rope made of bundles of protein fibers, and that the smallest strands are your actin and myosin myofilaments. Its their use of calcium and ATP that causes the binding and unbinding that makes sarcomeres contract and relax.

Table of Contents
Smooth, Cardiac, and Skeletal Muscles Create Movement 1:18
Sliding Filament Model 4:52
Skeletal Muscles Are Made of Bundles of Protein Fibers 2:40
Actin and Myosin Myofilaments 3:54
Calcium and ATP Cause the Binding and Unbinding 5:05

***

Crash Course is now on Patreon! You can support us directly by signing up at http://www.patreon.com/crashcourse

Thanks to the following Patrons for their generous monthly contributions that help keep Crash Course free for everyone forever:

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***SUBBABLE MESSAGES***

TO: SEM students
FROM: Mrs. S

You are confident and courageous! I believe in you! DFTBA!

--

TO: Zachary
FROM: She who gave you life!

You, like the Mongols, will always be the exception.

***SUPPORTER THANK YOU!***

Thank you so much to all of our awesome supporters for their contributions to help make Crash Course possible and freely available for everyone forever:

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CONSIGUE CUT THE ROPE
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SIGUE A OM NOM
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Disfruta con los dibujos animados y caricaturas de Om Nom, el protagonista de la serie Cut The Rope, ¡que ya tiene su propia serie de dibujos! Suscríbete a Las Historias de Om Nom, y no te pierdas ningún capítulo de esta caricatura infantil tan adorable.

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!


Don’t forget to subscribe: https://www.youtube.com/channel/UCvMF...

To watch more of our videos click on the following links:

Learn Colors with Om Nom Face Painting:
https://www.youtube.com/watch?v=qjTt7...

Learn Colors with Soccer Balls Xylophone:
https://www.youtube.com/watch?v=Ax-EA...

Learn Numbers and Colors with Underwater Sea Animals:
https://www.youtube.com/watch?v=pe-sz...

Om Nom Arts and Crafts:
https://www.youtube.com/watch?v=x4Lb3...

Daniel Calveti, Marcos Brunet , Ingrid Rosario, Nimsy Lopez, Julissa, René González, Yashira Guidini, Funky y Jacobo Ramos. Unidos en una gran noche de adoración en Puerto Rico.

Se realizó el 7 de enero de 2018 en el Coliseo de Puerto Rico, José Miguel Agrelot.

Tema del álbum en vivo desde Puerto Rico "Vivo Para Ti" publicado en 2005.

video musical

Domingo 13/septiembre/2015
Envío para la gloria de Dios el concierto que nuestro amado hno. Roberto Orellana ofreció en el TBB Apopa.

Oso Yogi - 09.- Oso Desconcertado

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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.

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"Pájaros hacen caca. MUCHA caca..."

Visite la pagina http://kiskeya.life/guano para una lista de las fuentes de este episodio.

Visite http://kiskeya.life para mas vídeos y artículos en Ingles y Español sobre Quisqueya!

¡Duda, investiga y aprende!

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#islaaltovelo #guano #kiskeyalife

------------------------------------------------

Créditos:

Escrito, dirigido y producido por Alec Corday
http://www.aleccorday.com

Productor Ejecutivo Lola Mendez
http://instagram.com/uh.lola
http://instagram.com/lolamendezphotography
http://www.uhlola.com
http://www.lolamendezphotography.com

Tema musical principal por SENNA
https://sennamusic.bandcamp.com/

"Sabias que los dinosaurios de Jurassic Park son Dominicanos?"

---------------------------------------------------

Visit http://kiskeya.life For more videos and articles about the Kiskeya island, also known as the Dominican Republic and Haiti!

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See here the camera and equipment we used:
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------------------------------------------------

Credits:

'Jurassic Park' footage copyright, Universal Pictures, 1993. All right reserved, used under fair use.

Written, directed, edited and produced by Alec Corday
http://www.aleccorday.com

Executive Producer Lola Mendez
http://www.uhlola.com

Theme Music by SENNA
http://sennamusic.tumblr.com/

"Don't touch my rum!"

Visit http://kiskeya.life For more videos and articles about the Kiskeya island, also known as the Dominican Republic and Haiti!

Patreon: https://www.patreon.com/user?u=877947
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See here the camera and equipment we used:
http://amzn.to/1VD2vSJ

------------------------------------------------

Credits:

Music by:
Joakim Karud "Great Days"

Written, directed, edited and produced by Alec Corday
http://www.aleccorday.com

Executive Producer Lola Mendez
http://www.uhlola.com

Theme Music by SENNA
http://sennamusic.tumblr.com/

All videos/pictures by
Alec Corday

Suscríbete A Nuestro Canal Aquí

Alejandro Bermúdez - Preguntas y respuestas

O Antiphons / Grandes antiennes « Ô » de l'Avent / O-Antiphonen / O antifone

17 December
O Wisdom, who came from the mouth of the Most High, reaching from end to end and ordering all things mightily and sweetly: come, and teach us the way of prudence.
O Sagesse, sortie de la bouche du Très-Haut, qui enveloppez toutes choses d'un pôle à l'autre et les disposez avec force et douceur, venez nous enseigner le chemin de la prudence.
O Mudrosti, što Svevišnjem iz usta vječnih izvireš, i s kraja jednog do drugog po cijelom svijetu dopireš sve snažno, blago redeći: dođi među nas, uči nas, da pravi put nam pokažeš!

18 December
O Lord and Ruler the house of Israel, who appeared to Moses in the flame of the burning bush and gave him the law on Sinai: come, and redeem us with outstretched arms.
Ô Adonaï, guide du peuple d'Israël, qui êtes apparu à Moïse dans le feu du buisson ardent, et lui avez donné vos commandements sur le mont Sinaï, armez votre bras, et venez nous sauver.
O Adonaju, Gospode, što Izraelov vodiš dom, što Mojsiju ukaza se odjeven plamnom kupinom, i dade zakon Sinajski: pohiti da nas izbaviš božanskom svojom desnicom!

19 December
O Root of Jesse, that stands for an ensign of the people, before whom the kings keep silence and unto whom the Gentiles shall make supplication: come, to deliver us, and tarry not.
Ô Fils de la race de Jessé, signe dresse devant les peuples, vous devant qui les souverains resteront silencieux, vous que les peuples appelleront au secours, délivrez-nous, venez, ne tardez plus !
O slavni Jesin korijene, što naroda si barjak svih, pred kojim tih će postati i glas sa usta kraljevskih, kog molit svi će narodi: ne kasni, dođi izbavi iz nevolja nas premnogih.

20 December
O Key of David, and scepter of the house of Israel, who opens and no man shuts, who shuts and no man opens: come, and lead forth the captive who sits in the shadows from his prison.
Ô Clef de la cité de David, sceptre du royaume d'Israël, vous ouvrez, et personne alors ne peut fermer ; vous fermez, et personne ne peut ouvrir ; venez, faites sortir du cachot le prisonnier établi dans les ténèbres et la nuit de la mort.
O divni ključu Davidov i vladaoče roda svog, što otvaraš i zatvaraš i nema stvora nikakvog, što spriječit bi te mogao: dođi dobrostiv, sužnjeve iz mraka vodi tamničkog.

21 December
O dawn of the east, brightness of light eternal, and sun of justice: come, and enlighten those who sit in darkness and in the shadow of death.
Ô Orient, splendeur de la Lumière éternelle, Soleil de justice, venez, illuminez ceux qui sont assis dans les ténèbres et la nuit de la mort.
O Istoče, o sjaju svet u svjetlosti vjekovitoj, ti sunce pravde istinske: ograni bijedi čovječjoj, što tumara po tminama! Prosvijetli sve, što gube se u smrtnoj sjeni nemiloj.

22 December
O King of the gentiles and their desired One, the cornerstone that makes both one: come, and deliver man, whom you formed out of the dust of the earth.
Ô Roi des nations, objet de leur désir, pierre angulaire qui unissez les peuples opposés, venez sauver l'homme que vous avez façonné d'argile.
O Kralju sviju naroda, kog srdačni im žudi plam, od ugla silni kamene, što rajski dom i zemski hram u jedno spajaš: dođi već i čovjeka, svoj zemljan stvor, iz crnog jada spasi sam.

23 December
O Emmanuel, God with us, our King and lawgiver, the expected of the nations and their Savior: come to save us, O Lord our God.
Ô Emmanuel, notre roi et législateur, que tous les peuples attendent comme leur Sauveur, venez nous sauver, Seigneur notre Dieu !
O Emanuele, Spase blag, Zakonošo i Kralju naš, ti nado sviju naroda, što milostiv ih izbavljaš: o dođi sa neba, Gospodine i Bože naš, da spasenje nam vječno daš.

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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.
Lo importante es divertirse y tener lo mejor de minecraft para bebes en 2017 y 2018!

Taizé Roma - Prayer with Pope Benedict XVI - Psallite Deo


Taizé - Un Pellegrinaggio di Fiducia a Roma
Preghiera presieduta dal Santo Padre Benedetto XVI
Piazza San Pietro, 29 dicembre 2012

Taizé - Pilgrimage of Trust in Rome
Prayer presided by Holy Father Benedict XVI
St Peter's square, 29 December 2012

La communauté de Taizé - Rencontre européenne à Rome
La Comunità di Taizé - Incontro europeo di Roma
The Taizé Community - European Meeting in Rome
Die Communauté de Taizé - Europäisches Jugendtreffen in Rom
La comunidad de Taizé - Encuentro en Roma
Zajednica iz Taizéa - Europski susret mladih u Rimu
Wspólnota z Taizé - Spotkanie w Rzymie
A Comunidade de Taizé - Encontro Europeu de Roma

Pronto será Halloween y Bebe Juan saldrá con su disfraz al igual que toda la familia a pedir dulces o trucos. Esta canción infantil es muy especial buuuuu!!! ¿De que te vas a disfrazar en la noche de brujitas?

¡Aprende y disfruta con todos nuestros divertidos videos para niños en 3D! #bebejuan #cancionesinfantiles #littleangelespañol #bebejuanenespañol

(?️) Subscríbete a Little Angel Español para ver videos nuevos en cuanto salgan ?►► http://bit.ly/suscribete_LittleAngel_Esp

¡Ve a tu canción favorita eligiendo en el título debajo!
00:04 Canción de Halloween para niños ?
03:52 Un Elefante se Balanceaba https://youtu.be/5uCM3PXQ6RY
07:24 Mi Primer Show de Magia https://youtu.be/p_UKAxy12hE
10:27 El Baile de los Animales https://youtu.be/ihQIRvylyCo

Letra: ¡Dulce o Truco!
---------------------------------------------------
Hoy por fin es halloween
En las calles se ve, boo!
De puerta en puerta hay que ir
Toc, Toc ábreme!

Dulce, o truco
En las casas dulces busco
Dulce, o truco
Este día me gusta mucho!

No te vayas a asustar
Todo es por diversión, Boo!
Si te fijas un poco más
Te sorprenderás!

Dulce, o truco
En las casas dulces busco
Dulce, o truco
Este día me gusta mucho!

A tus amigos encontrarás
todos con disfraz, Ooh!
Dulce o truco buscarán
la pasarán genial!

Dulce, o truco
En las casas dulces busco
Dulce, o truco
Este día me gusta mucho!

Algunos dulces te darán
Otros no lo harán, woo!
Pero siempre alguien hay
Que compartirá

Dulce, o truco
En las casas dulces busco
Dulce, o truco
Este día me gusta mucho!

Y si dulces no te dan
Frutas siempre habrán . Duh!
Vamos intenta probar
Te van a encantar!

Dulce, o truco
En las casas dulces busco
Dulce, o truco
Este día me gusta mucho!

Cuando acaben de buscar
sus dulces comerán, woo!
También los compartirán
Para que haya más!

Dulce, o truco
En las casas dulces busco
Dulce, o truco
Este día me gusta mucho!
---------------------------------------------------

Nuestras canciones para niños enseñan habilidades básicas y mejoran su habilidad para comprender y seguir instrucciones. Las canciones infantiles aceleran las capacidades fonéticas y mejoran la comprensión oral, de lectura y escritura.

No olvides darnos un LIKE (?) si disfrutaste este video.

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Música infantil, canciones para niños, Spanish for kids, nursery rhymes Spanish, Spanish kids songs.