The Domestic Cat: The Biology of its Behaviour | Read

The Domestic Cat: The Biology of its Behaviour
http://readingbooks.host/?book=0521636485

See How Easily a Rat Can Wriggle Up Your Toilet | National Geographic

A rat’s ribs are hinged at the spine, enabling it to easily squeeze through the tightest spaces—like the pipes draining your toilet. And rats are great swimmers too; they can hold their breath for up to three minutes. See how quickly a rat can go from the city streets to your bathroom.
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Click here to read more: http://phenomena.nationalgeographic.com/2015/08/14/yes-rats-can-swim-up-your-toilet-and-it-gets-worse-than-that/

ASSOCIATE PRODUCER: Jed Winer
NARRATOR: Daniel Stone

See How Easily a Rat Can Wriggle Up Your Toilet | National Geographic
https://youtu.be/0t2VPBF6Kp4

National Geographic
https://www.youtube.com/natgeo

Channel: National Geographic
Published: 2015-08-14 18:24:27
Duration: 3M2S
Views: 30607125
Likes: 107902
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Why Women Are Stripey

Epigenetics means women have different active x-chromosomes in different cells. Animation courtesy of http://wehi.tv
Music by Amarante: http://bit.ly/VeAmarante
Animation: Etsuko Uno
Art and Technical Direction: Drew Berry
Sound Design: Francois Tetaz & Emma Bortignon
Scientific Consultation: Marnie Blewitt
Courtesy of Walter and Eliza Hall Institute of Medical Research: http://wehi.tv

When a female embryo is four days old it consists of just 100 cells. At this point the x-chromosome from Mom and the one from Dad are both active. But in order for proper development to occur, one of the x chromosomes must be switched off.

Through a tiny molecular battle within each cell, one of the x-chromosomes wins and remains active while the loser is deactivated.

This is done by wrapping the DNA tighter around proteins, modifying histone tails, and DNA methylation – molecular markers to indicate this DNA should not be read.

What’s surprising is that it’s pretty random which x chromosome wins – sometimes it’s Mom’s and sometimes it’s Dad’s. So when a female is just 100 cells big, her cells have a mix of active x-chromosomes, some from Mom and some from Dad.

Channel: Veritasium
Published: 2014-06-02 14:44:13
Duration: 5M17S
Views: 4049760
Likes: 66086
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Cognition and Suicide: Theory, Research, and Therapy | Download

Cognition and Suicide: Theory, Research, and Therapy
http://readingbooks.host/?book=1591473578
Channel: Hoa Wiste
Published: 2017-08-18 07:30:18
Duration: 1M53S
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Computation and Human Experience (Learning in Doing: Social, Cognitive and Computational

Computation and Human Experience (Learning in Doing: Social, Cognitive and Computational Perspectives)
http://readingbooks.host/?book=0521386039
Channel: Hoa Wiste
Published: 2017-08-18 07:28:06
Duration: 1M1S
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Independent Component Analysis: A Tutorial Introduction (MIT Press) | Download

Independent Component Analysis: A Tutorial Introduction (MIT Press)
http://readingbooks.host/?book=0262693151
Channel: Hoa Wiste
Published: 2017-08-18 07:29:10
Duration: 2M7S
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