Leopards and other big cats don't usually hunt in water, but these family of leopards is not afraid of getting wet and go fishing.
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David Attenborough narrates the intimate story of a leopard mother and her two cubs. This family must survive in the wilds of Botswana alongside some less-than-friendly neighbours: lions, wild dogs and hyenas. The competition for food is tough, and if they are going to make it they must learn a new skill - they must learn to fish.

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Watch more videos from BBC Earth:
Planet Earth http://bit.ly/PlanetEarthPlaylist
Blue Planet http://bit.ly/BluePlanetPlaylist
Planet Earth II http://bit.ly/PlanetEarthIIPlaylist
Planet Dinosaur http://bit.ly/PlanetDinoPlaylist

David Attenborough narrates the intimate story of a leopard mother and her two cubs. This family must survive in the wilds of Botswana alongside some less-than-friendly neighbours: lions, wild dogs and hyenas. The competition for food is tough, and if they are going to make it they must learn a new skill - they must learn to fish.

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 astounding, entertaining, thought-provoking and educational natural history content.

Want to share your views with the team behind BBC Earth and win prizes? Join our fan panel here: http://tinyurl.com/YouTube-BBCEarth-FanPanel

This is a channel from BBC Worldwide who help fund new BBC programmes
Service information and feedback: http://bbcworldwide.com/vod-fe....edback--contact-deta

A basketball and a 5kg medicine ball are dropped simultaneously. Which one hits the ground first? It seems obvious that the heavy one should accelerate at a greater rate and therefore land first because the force pulling it down is greater. But this is forgetting inertia - the tendency of mass to resist changes in motion. Therefore, although the force on the medicine ball is greater, it takes this larger force to accelerate the ball at the same rate as the basketball.

There are a few persistent misconceptions about what causes the seasons. Most believe it is the distance between the Earth and sun which varies to give us seasonal temperature variations. However it is actually the directness of the sun's rays leading to more intense sunshine in summer and less in winter.

The birth of a baby Panda is captured on camera at a sanctuary in China.

Taken From Panda Babies

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One of the most common physics misconceptions is that an unbalanced force causes constant motion. In truth, an unbalanced force leads to changes in motion - accelerations.

From the 'Going to California' concert

Camila interpreta "Rolling In The Deep" de Adele en las primeras audiciones a ciegas de la cuarta edición de La Voz Kids.

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On the surface of Earth all objects accelerate downwards at the same rate - at least, they're supposed to. But we all know dust, pieces of paper, and feathers fall slower. This is of course due to the influence of air resistance. In this experiment we use an evacuated cylinder to test whether a coin and feather really do accelerate at the same rate.

Want to help plant 20M trees by 2020? Go to https://teamtrees.org #teamtrees
Huge thanks to all the YouTubers who organized this. My apologies for the repost.
These videos are from 2012 so my interest in trees goes back a long ways. I think these videos discuss two of the most interesting and amazing facts about our leafy friends: they are made mostly of CO2 (which comes from us breathing out amongst other sources) and they can transport water up a tube higher than any we can currently manufacture. So trees are out to get you. But we do much worse to them so we owe it to them to plant some more. 20 mil is a good start.

Este es el primer video de ciencias de Veritasio. Este video trata sobre uno de los conceptos más fundamentales en la ciencia: la idea que todas las cosas están hechas de átomos, pequeñas partículas que están en movimiento perpetuo. Se atraen unos a otros cuando los separa una pequeña distancia y se repelen cuando se estrujan.

Este video es una traducción del video "Atomic Theory" de Veritasium- https://www.youtube.com/watch?v=U2g1H...

Veritasio es el canal de doblaje de Veritasium al español. ¡Suscríbete!

Dirección y edición- Enrique Morán
Traducción- Diego Magaña

Doblaje por:
Enrique Morán - Derek Muller

Veritasium fue fundado por Derek Muller - https://www.youtube.com/user/1veritasium

Video anterior- "Jeringa de Fuego" - https://www.youtube.com/watch?v=2PSd1...

As the sea ice melts ever earlier in the season, swimming to escape predators becomes even harder. Can this penguin survive its deadly dash to freedom?

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Episode 1 | Antarctica | Seven Worlds, One Planet

Millions of years ago incredible forces ripped apart the Earth’s crust creating seven extraordinary continents. Seven Worlds, One Planet, narrated by Sir David Attenborough, will reveal how each distinct continent has shaped the unique animal life found there.

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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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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Joshua Abenir, Tony Fadell, Donal Botkin, Jeff Straathof, Zach Mueller, Ron Neal, Nathan Hansen

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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

All the large-scale structure in the universe may owe its existence to nothing.
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Let's see how clearly I can explain this. We think of empty space as, well... empty, the epitome of nothingness. But as our understanding of physics has evolved we have realized that it's not truly empty. Space is filled with fields. There is a field for every subatomic particle. One for electrons, up quarks, down quarks, neutrinos and so on. In empty space these fields are basically zero, flat, nil. But it's impossible to make them perfectly zero so there are always some quantum fluctuations in the fields, even in a perfect vacuum. These are sometimes called virtual particles but they should really just be thought of as little disturbances in the field. Vacuum fluctuation play a role mediating the interactions of subatomic particles but they don't really have an impact on the large-scale structure of the universe, EXCEPT during inflation, right after the big bang when the universe increased in size 10^26 times. Due to this rapid expansion, those tiny fluctuations were blown up to the scale of the observable universe. And we know this by looking at the cosmic microwave background radiation where we can see slightly hotter and cooler parts of the early universe that correspond to density fluctuations. And it is these density fluctuations that allowed matter to clump together into large structures like the gigantic gas clouds that would go on to contain stars and planets. In case the video isn't clear, this is what I've been trying to say.

Animations by Gustavo Rosa

This video was sponsored in part by Dyson #ad

El eclipse total de sol que tuve la oportunidad de presenciar en Madras, Oregón, ocurrió el 21 de agosto del 2017 y la experiencia fue maravillosa.
Cuando la luna pasó frente al sol, el día se transformó en noche y reveló la corona solar, deslumbrándonos a todos los presentes.

Hay quienes dicen que no debes fotografiar tu primer eclipse solar y quizás tengan razón. Estaba concentrado en obtener la exposición adecuada para poder ver las perlas de Baily y el anillo de diamantes, además de asegurarme de capturar la corona y las llamaradas solares. Esto fue un poco estresante pero estoy encantado con los resultados.

El último eclipse solar total fue el 2 de julio de 2019. Se pudo ver totalmente en ciertas regiones de Argentina y Chile. En el resto de Sudamérica se vio parcialmente.

Quiero agradecer especialmente al Dr. Teagan Wall por compartir esta experiencia conmigo y a Raquel Nuno por inspirarme a venir a Oregón.

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Servicios de doblaje: Unilingo
Traductora: Paula Salomone
Voz de doblaje: Pato Lago
Ingeniero de sonido: Gastón Adriel Álvarez
Edición y post-producción de video: Yoel Aaron Echegaray Salas, Juan Caille Tornquist
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#veritasiumenespañol
#eclipsesolar

Carla interpreta "Mañana" de María parrado, en las cuartas audiciones a ciegas de la tercera edición de La Voz Kids.

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If you repeat something enough times, it comes to feel good and true.
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More info on cognitive ease: http://bit.ly/29OMGas

This episode was inspired by the book Thinking Fast and Slow by Daniel Kahneman.

This video was edited by Daniel Joseph Files, with music from Kevin MacLeod at http://incompetech.com "Marty Gots a Plan" "Sing Along With Jim" and "Full On".

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Jason Buster, Saeed Alghamdi, Tony Fadell, Donal Botkin, Bryan Baker, & Imthetroublesolver 8)

Cuando se comprime el aire rápidamente, puede alcanzar temperaturas altas. En esta demostración, enseñamos como el algodón puede llegar al punto de auto-ignición por una compresión rápida de aire en la jeringa de fuego.

Veritasio es el canal de doblaje de Veritasium al español. ¡Suscríbete!

Dirección y edición- Enrique Morán
Traducción- Diego Magaña

Doblaje por:
Diego Magaña - Derek Muller
Enrique Morán- Nigel

Veritasium fue fundado por Derek Muller- https://www.youtube.com/channe....l/UCHnyfMqiRRG1u-2Ms

Nerea, Lucía y Laura interpretan "Radioactive" de Imagine Dragons en las segundas batallas de la cuarta edición de La Voz Kids.

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Some notes:
We each repeated the experiment 3 times, and got the same results every time. For those of you who might be skeptical, great! A right circular prismatic kiddie pool is only $10 and you can do the experiment for yourself at your latitude. There's really no reason you shouldn't do it for yourself.

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Gordon McGladdery did all of the sound design for the video. We used two songs from other artists (licensed of course). Derek split the first one up so it fades from video to video, and Gordon split the instruments up on the second one. There are violins on one video and percussion on the other for example. It's really neat.

The neat earth animation at the beginning and the synchronizing timer was made by http://eisenfeuer.com/. He also made still images of the earth from the top and the bottom.

Thanks to Vanessa for filming in Sydney: http://youtube.com/braincraftvideo

MORE INFO:

There was a study performed at MIT years ago (http://web.mit.edu/hml/ncfmf/09VOR.pdf) that explained the physics involved. We repeated some of these demonstrations, but on opposite sides of the globe…and in a way that can be easily understood.
This site is a great resource on the Coriolis effect and ways people have gotten it wrong:
http://www.ems.psu.edu/~fraser/Bad/Ba...

Ainhoa interpreta "Lento" de Julieta Venegas en el segundo Último Asalto de la cuarta edición de La Voz Kids.

Si estás en España:
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Si estás fuera de España:
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