These are the molecular machines inside your body that make cell division possible. Animation by Drew Berry at the Walter and Eliza Hall Institute of Medical Research. http://wehi.tv

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Every day in an adult human roughly 50-70 billion of your cells die. They may be damaged, stressed, or just plain old - this is normal, in fact it’s called programmed cell death.

To make up for that loss, right now, inside your body, billions of cells are dividing, creating new cells.

And cell division, also called mitosis, requires an army of tiny molecular machines.DNA is a good place to start - the double helix molecule that we always talk about.

This is a scientifically accurate depiction of DNA. If you unwind the two strands you can see that each has a sugar phosphate backbone connected to the sequence of nucleic acid base pairs, known by the letters A,T,G, and C.

Now the strands run in opposite directions, which is important when you go to copy DNA. Copying DNA is one of the first steps in cell division. Here the two strands of DNA are being unwound and separated by the tiny blue molecular machine called helicase.
It literally spins as fast as a jet engine! The strand of DNA on the right has its complimentary strand assembled continuously but the other strand is more complicated because it runs in the opposite direction.
So it must be looped out with its compliment strand assembled in reverse, section by section. At the end of this process you have two identical DNA molecules, each one a few centimeters long but just a couple nanometers wide.

To prevent the DNA from becoming a tangled mess, it is wrapped around proteins called a histones, forming a nucleosome.
These nucleosomes are bundled together into a fiber known as chromatin, which is further looped and coiled to form a chromosome, one of the largest molecular structures in your body.
You can actually see chromosomes under a microscope in dividing cells - only then do they take on their characteristic shape.

The process of dividing the cell takes around an hour in mammals. This footage is from a time lapse. You can see how the chromosomes line up on the equator of the cell. When everything is right they are pulled apart into the two new daughter cells, each one containing an identical copy of DNA.
As simple as it looks, this process is incredibly complicated and requires even more fascinating molecular machines to accomplish it. Let’s look at a single chromosome. One chromosome consists of two sausage-shaped chromatids - containing the identical copies of DNA made earlier. Each chromatid is attached to microtubule fibers, which guide and help align them in the correct position. The microtubules are connected to the chromatid at the kinetochore, here colored red.
The kinetochore consists of hundreds of proteins working together to achieve multiple objectives - it’s one of the most sophisticated molecular mechanisms inside your body. The kinetochore is central to the successful separation of the chromatids. It creates a dynamic connection between the chromosome and the microtubules. For a reason no one’s yet been able to figure out, the microtubules are constantly being built at one end and deconstructed at the other.
While the chromosome is still getting ready, the kinetochore sends out a chemical stop signal to the rest of the cell, shown here by the red molecules, basically saying this chromosome is not yet ready to divide
The kinetochore also mechanically senses tension. When the tension is just right and the position and attachment are correct all the proteins get ready, shown here by turning green.
At this point the stop signal broadcasting system is not switched off. Instead it is literally carried away from the kinetochore down the microtubules by a dynein motor. This is really what it looks like. It has long ‘legs’ so it can avoid obstacles and step over the kinesins, molecular motors walking the other direction.

Studio filming by Raquel Nuno

It's the most abundant liquid on the planet and by weight we are about 60% water. But do we know what it is made of?

Australian Science week runs August 13-21. Check out scienceweek.gov.au for more details.

POPURRI MARCELA GANDARA Supe Que Me Amabas, Dame Tus Ojos, Un Viaje Largo, El Mismo Cielo
https://youtu.be/2iCoQXbXUTs
Lista de canciones:
01. Supe Que Me Amabas
02. Dame Tus Ojos
03. Un Viaje Largo
04. El Mismo Cielo
05. Antes De Ti
06. En Tu Hogar
07. Tu Palabra
08. Mas Que Un Anhelo
09. Me Haces Crecer
10. Es Una Aventura
11. Girando Hacia Ti
12. Quiero Ver

Follow Marcela Gandara:
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Señor ven a mí

Can we see things travelling faster than light?
Check out Audible: http://bit.ly/AudibleVe
Music by Amarante "One Last Thing" http://bit.ly/VeAmarante
Awesome animations by http://youtube.com/minutephysics
Thanks to Prof. Geraint Lewis for input on earlier drafts of this video.

The expanding universe is a complicated place. During inflation the universe expanded faster than light, but that's something that actually happens all the time, it's happening right now. This doesn't violate Einstein's theory of relativity since nothing is moving through space faster than light, it's just that space itself is expanding such that far away objects are receding rapidly from each other. Common sense would dictate that objects moving away from us faster than light should be invisible, but they aren't. This is because light can travel from regions of space which are superluminal relative to us into regions that are subluminal. So our observable universe is bigger than our Hubble sphere - it's limited by the particle horizon, the distance light could travel to us since the beginning of time as we know it.

El centro de nuestra vida sacramental, la Eucarística con el Dr. Fernando Casanova.

Canciones de adoración a Dios.

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Dios te bendiga.

00:00 01. Úngeme
04:13 02. Magnífico
09:17 03. Confió en Dios
13:36 04. Tengo fe
17:24 05. Te daré
21:41 06. Confesión
25:55 07. Cada mañana
30:23 08. Unos a otros
33:44 09. Úngeme (Pista)
37:57 10. Magnífico (Pista)
43:00 11. Confió en Dios (Pista)
47:19 12. Tengo fe (Pista)
51:36 13. Te daré (Pista)
55:50 14. Confesión (Pista)
1:00:18 15. Cada mañana (Pista)
1:03:40 16. Unos a otros (Pista)

In which John Green teaches you the history of Christianity, from the beginnings of Judaism and the development of monotheism, right up to Paul and how Christianity stormed the Roman Empire in just a few hundred years. Along the way, John will cover Abram/Abraham, the Covenant, the Roman Occupation of Judea, and the birth, life, death and legacy of Jesus of Nazareth. No flame wars! Let's keep the commentary civil.

Crash Course World History is now available on DVD! http://store.dftba.com/product....s/crashcourse-world-

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Description

Mimed performance overdubbed with Live soundtrack from a-ha's Homecoming Live in Valhall DVD
http://www.amazon.co.uk/Ha-Hom....ecoming-Live-Vallhal

Part 1 of The Making Of… Take On Me covers the story behind the origins of the song with commentary from the band and an array of contributors

An exclusive limited edition blue Take On Me 7" is available now to celebrate the release of The Making Of…Take On Me https://lnk.to/TakeOnMeBlueVinyl

Watch the Take On Me video and take a guess at when it will reach 1 BILLION VIEWS for a chance to win tickets to meet a-ha on tour http://bit.ly/ahaTakeOnMe

Produced and Directed by Sorcha Macdonald and Warner Music Entertainment

Project Managed by Katie Graham

Photography by Fritz Johannessen, Henning Kramer Dahl, Just Loomis, Per Arne Skjeggestad, Viggo Bondi

With thanks to… Alan Tarney, Andrew Wickham, Bethany Dawson, Candace Reckinger, Ed Miliband, Ed Sheeran, Harald Wiik, James Blunt, Jamie Carter, Jeff Ayeroff, John Beug, John Hughes, Just Loomis, Magne Furuholmen, Michael Patterson, Morten Harket, Nile Rodgers, Paul Waaktaar-Savoy, Pete Vuckovic, Richard Hughes, Tim Rice-Oxley, Tom McPhee, Tyler Shoemaker, The Savoy Café and Harriet Davis

? Listen to more a-ha here https://lnk.to/ahastrm
? Watch all the official a-ha videos here http://bit.ly/ahaOfficialVideos

? Subscribe to the a-ha channel and “ring the bell” to turn on notifications http://bit.ly/Subscribetoaha

Stay In Touch with a-ha…

? Website https://a-ha.com/
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Stay In Touch with Morten Harket…

? Website https://mortenharket.com/
? Facebook https://www.facebook.com/mortenharket.official/
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? Twitter https://twitter.com/mortenharket

*******************

The a-ha channel is the official YouTube home of the Norwegian Pop trio a-ha, who achieved global stardom in 1985 when their debut single, “Take On Me” from the album ‘Hunting High And Low’ topped the charts in 36 different countries on its way to becoming one of the best-selling singles of all time, and the 5th most streamed song of the 20th century. a-ha struck chart gold again with “The Sun Always Shines On T.V.” and “Cry Wolf,” and recorded the theme to the 1987 James Bond film “The Living Daylights”. The a-ha YouTube channel is proud to host the music videos from these hits alongside live performance videos, lyric videos, and the solo work of band members Morten Harket (lead vocals), Paul Waaktaar-Savoy (Guitar), and Magne Furuholmen (Keyboards).

1. Ungeme
2. Magnifico
3. confio en Dios
4. Tengo fe
5. Te daré
6. Creyendo en ti
7. Cada mañana
8. Mi vida está llena de ti
9. Regresa a casa
10. Anoche llegaste tarde
11. Árbol sin raices
12. Créele
13. Mi pensamiento eres tu

a-ha - The Swing of Things 6.03.2016 live @Uralets in Ekaterinburg

My English cover of Tu Estas Aqui by Jesus Adrian Romero. It's not perfect by any means. I make a lot of weird faces, and its a tad pitchy, but I do hope God touches you in one way or another through this cover. All the glory be to Him forever and ever.

Marzo 3, 2015 • No Juzgar a Otros – Con Nosotros Tenemos Suficiente
Hay que tener claro que el juicio es de Dios. Él sabe lo que uno está pensando, lo que uno tiene en su corazón, en sus entrañas propiamente, y toma todos los factores en consideración para emitir el juicio. El juicio de Dios siempre está ungido de misericordia. El P. Willie Peña nos habla de la justicia legal, la justicia divina y otros temas más en este nuevo programa de “Mientras el Mundo Gira”.
http://ewtn.com/espanol • http://ewtn.com/espanol/tv/envivo/mie... • https://www.facebook.com/ewtnespanol • https://www.youtube.com/user/EWTNespanol