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Viewers like you help make PBS (Thank you ๐Ÿ˜ƒ) . Support your local PBS Member Station here: https://to.pbs.org/PBSDSDonate

Check out Planet Earth II! https://youtu.be/c8aFcHFu8QM
On BBC One in the UK this Sunday and coming to BBC America on 28th January 2017
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Want to wear your love for science? Weโ€™ve got merch: http://dftba.com/besmart

Find out when you can watch Planet Earth II:
http://www.bbcamerica.com/shows/planet-earth
http://www.bbc.co.uk/programmes/p02544td
Special thanks to BBC Earth: https://www.youtube.com/user/BBCEarth

Planet Earth II is a BBC Studios Natural History Unit Production, co-produced with BBC America, ZDF, Tencent and France Tรฉlรฉvision

Books from this episode:
โ€œSuperdoveโ€ by Courtney Humphries: http://amzn.to/2h0sZly
โ€œUnseen Cityโ€ by Nathanael Johnson http://amzn.to/2g3v1nM

-References/Learn More-

Robert Fultonโ€™s illustrated โ€œBook of Pigeonsโ€ - 1876 https://archive.org/details/illustratedbooko00robe

Scarf, Damian, Harlene Hayne, and Michael Colombo. "Pigeons on par with primates in numerical competence." Science 334.6063 (2011): 1664-1664.

Scarf, Damian, et al. "Orthographic processing in pigeons (Columba livia)." Proceedings of the National Academy of Sciences 113.40 (2016): 11272-11276.

Skinner, Burrhus F. "Pigeons in a pelican." American Psychologist 15.1 (1960): 28.

Watanabe, Shigeru, Junko Sakamoto, and Masumi Wakita. "PIGEONS'DISCRIMINATION OF PAINTINGS BY MONET AND PICASSO." Journal of the experimental analysis of behavior 63.2 (1995): 165-174.

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Itโ€™s Okay To Be Smart is written and hosted by Joe Hanson, Ph.D.
Have an idea for an episode or an amazing science question you want answered? Leave a comment or check us out at the links below!
Facebook: http://www.facebook.com/itsokaytobesmart
Twitter: http://twitter.com/okaytobesmart
http://twitter.com/jtotheizzoe
Tumblr: http://www.itsokaytobesmart.com
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Snapchat: YoDrJoe

Produced by PBS Digital Studios
Music via APM
Stock images from SciencePhoto http://www.sciencephoto.com/ and Shutterstock http://www.shutterstock.com

Teacherflix
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Viewers like you help make PBS (Thank you ๐Ÿ˜ƒ) . Support your local PBS Member Station here: https://to.pbs.org/PBSDSDonate

Check out our whole series on ENERGY! http://bit.ly/1BnH5zu
Subscribe: http://bit.ly/iotbs_sub Twitter: @okaytobesmart
โ†“ More info and sources below โ†“

The world of energy is a confusing place. What's better, nuclear or solar? What's the difference between fluorescent bulbs and LEDs? What's the difference between energy and power? And what the heck is a kilowatt-hour?!

In this video, we give you a tour of the essential principles behind the energy machine that puts fuel in our tanks and brings electricity to our homes. To be a good energy citizen, you need to speak the language
LEARN MORE:
Special thanks to Sheril Kirshenbaum and the Webber Energy Group at the University of Texas at Austin for their help with this series. http://www.webberenergygroup.com/

Check out their awesome online course "Energy 101" to learn about energy and energy policy from A to Z! http://www.energy101.com/

And to find out what people think about energy, check out the UT Energy Poll: http://www.utenergypoll.com/


Have an idea for an episode or an amazing science question you want answered? Leave a comment or check us out at the links below!
Follow on Twitter: http://twitter.com/okaytobesmart
http://twitter.com/jtotheizzoe
Follow on Tumblr: http://www.itsokaytobesmart.com
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It's Okay To Be Smart is written and hosted by Joe Hanson, Ph.DFollow me on Twitter: @jtotheizzoe
Email me: itsokaytobesmart AT gmail DOT com
Facebook: http://www.facebook.com/itsokaytobesmart
Google+ https://plus.google.com/+itsokaytobesmart
For more awesome science, check out: http://www.itsokaytobesmart.com
Produced by PBS Digital Studios: http://www.youtube.com/user/pbsdigitalstudios

Joe Hanson - Creator/Host/Writer
Joe Nicolosi - Director
Amanda Fox - Producer, Spotzen IncKate Eads - Associate Producer
Andrew Matthews - Editing/Motion Graphics/Animation
Katie Graham - Director of Photography
John Knudsen - Gaffer

Theme music:
"Ouroboros" by Kevin MacLeod

Other music via APM

Stock images from Shutterstock, stock footage from Videoblocks

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Last week's video:
Does the Moon Orbit the Earth? https://www.youtube.com/watch?v=3cJ3AemeUFM

More videos:
Why Does February Have 28 Days? https://www.youtube.com/watch?v=AgKaHTh-_Gs
Why Vaccines Work https://www.youtube.com/watch?v=3aNhzLUL2ys
Why Are Some People Left-Handed? https://www.youtube.com/watch?v=NPvMUpcxPSA
Where Does the Smell of Rain Come From? https://www.youtube.com/watch?v=lGcE5x8s0B8

Teacherflix
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Viewers like you help make PBS (Thank you ๐Ÿ˜ƒ) . Support your local PBS Member Station here: https://to.pbs.org/PBSDSDonate

Pluto's not just coolโ€ฆ it's ICE COLD
Tweet โ‡’ http://bit.ly/OKTBSpluto Share on FB โ‡’ http://bit.ly/OKTBSplutoFB
โ†“ More info and sources below โ†“

Since New Horizons flew by Pluto on July 14, 2015, it's completely redefined what we know about the dwarf planet and its largest moon Charon. New Horizons' mission will continue to be full of surprises, but here's what we've learned so far
T-SHIRTS! http://dftba.com/besmart

Unless otherwise noted, all images and animations courtesy of NASA/JHUAPL/SwRI

MORE NEW HORIZONS STUFF:
Calculate your Pluto time: http://solarsystem.nasa.gov/plutotime/
New Horizons image gallery: https://www.nasa.gov/mission_p....ages/newhorizons/ima
Planetary Society New Horizons news: http://www.planetary.org/blogs..../blog-archive.html?k
Nadia Drake's excellent New Horizons coverage: http://phenomena.nationalgeogr....aphic.com/search/plu
Pluto and Charon are weird: http://news.nationalgeographic.....com/2015/07/150715-
What kind of ices are on Pluto? http://space.io9.com/the-ice-o....f-pluto-is-more-dive
Pluto's hazy atmosphere: https://www.nasa.gov/press-rel....ease/nasa-s-new-hori
Geologic features of Pluto and Charon: http://space.io9.com/were-acti....vely-creating-the-ge
What are tholins? Why Pluto looks red: http://www.planetary.org/blogs..../guest-blogs/2015/07
Pluto's other moons, Nix and Hydra: http://www.nasa.gov/image-feat....ure/new-horizons-cap
Pluto's family portrait: http://www.planetary.org/multi....media/space-images/s
Dwarf planets of the solar system: http://www.space.com/18584-dwa....rf-planets-solar-sys
Catalog of unusual "minor planet objects" in solar system: http://www.minorplanetcenter.n....et/iau/lists/Unusual

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Joe Hanson - Creator/Host/Writer
Joe Nicolosi - Director
Amanda Fox - Producer, Spotzen IncKate Eads - Producer
Stephen Bohls - Editing/Motion Graphics/Animation
Katie Graham - Camera
John Knudsen - Gaffer

Theme music: "Ouroboros" by Kevin MacLeod

Other music via APM
Stock images from Shutterstock, stock footage from Videoblocks

Teacherflix
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PBS Member Stations rely on viewers like you. To support your local station, go to: http://to.pbs.org/DonateOKAY
โ†“ More info and sources below โ†“

Weโ€™re on PATREON! Join the community โ–บโ–บ https://www.patreon.com/itsokaytobesmart
SUBSCRIBE so you donโ€™t miss a video! โ–บโ–บ http://bit.ly/iotbs_sub

When is now? Seems like a pretty simple questionโ€ฆ just look at your watch. But do you and I share the same โ€œnowโ€? Letโ€™s journey from Einsteinโ€™s thought experiments about relativity to cutting edge neuroscience research to try and answer that question.

References: https://sites.google.com/view/....when-is-now-referenc

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Special thanks to our Brain Trust Patrons:

dani bowman
David Johnston
Ahmed Elkhanany
Zenimal
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Baerbel Winkler
Robert Young
Amy Sowada
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Eric Meer
Jay Stephens
Peter Ehrnstrom
Dustin
Marcus Tuepker
Karen Haskell
AlecZero
Diego Lombeida


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Teacherflix
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Viewers like you help make PBS (Thank you ๐Ÿ˜ƒ) . Support your local PBS Member Station here: https://to.pbs.org/PBSDSDonate

How do we protect what we donโ€™t know exists?
Donโ€™t miss the next video! SUBSCRIBE! โ–บโ–บ http://bit.ly/iotbs_sub
โ†“ More info and sources below โ†“

How many species are there on Earth? In biology, this is one of a fundamental question that we still donโ€™t have a very good answer for. Imagine if chemists didnโ€™t know all the elements of the periodic table, or if physicists didnโ€™t know all of the particles of the standard model. Knowing how many different species there are is information we need to know in order to protect the environment, but itโ€™s a lot harder than you think!

Check out last weekโ€™s video, where we find a weird caterpillar in the Peruvian Amazon and ask โ€œHow do you discover a new species?โ€

LEARN MORE:

Costello, Mark J., Robert M. May, and Nigel E. Stork. "Can we name Earth's species before they go extinct?." Science 339.6118 (2013): 413-416.

Locey, Kenneth J., and Jay T. Lennon. "Scaling laws predict global microbial diversity." Proceedings of the National Academy of Sciences (2016): 201521291.

May, Robert M. "The future of biological diversity in a crowded world." Current Science 82.11 (2002): 1325-1330.

May, Robert M. "How many species inhabit the earth." Scientific American 267.4 (1992): 42-48.

Mora, Camilo, et al. "How many species are there on Earth and in the ocean?." PLoS Biol 9.8 (2011): e1001127.

Stork, Nigel E. "How many species are there?." Biodiversity and Conservation 2.3 (1993): 215-232.

FOLLOW US:

Itโ€™s Okay To Be Smart is written and hosted by Joe Hanson, Ph.D.
Director: Joe Nicolosi
Editor/animator/producer: Andrew Matthews
Producer: Stephanie Noone and Amanda Fox

Facebook: http://www.facebook.com/itsokaytobesmart
Twitter: @okaytobesmart @DrJoeHanson
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Produced by PBS Digital Studios
Music via APM
Stock images from Shutterstock http://www.shutterstock.com

Teacherflix
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PBS Member Stations rely on viewers like you. To support your local station, go to: http://to.pbs.org/DonateOKAY
โ†“ More info and sources below โ†“

Thanks to Brilliant for supporting PBS. Learn more at: https://brilliant.org/BeSmart

Weโ€™re on PATREON now! Join the community โ–บโ–บ https://www.patreon.com/itsokaytobesmart

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Half a century ago, astronauts got on top of a really big rocket and sent a tiny little capsule on a 384,000 km trip to the moon and back. And they were able to do it because a lot of extremely smart and dedicated people pushed engineering and chemistry to the limits in order to create a 36-story tower of carefully-controlled space fire powerful enough to escape Earthโ€™s gravity. I went to NASA in Houston to talk to astronaut Don Pettit about how they did it, and if weโ€™ll be able to do it again.

Special thanks to Don Pettit and NASA

Special thanks to our Brain Trust Patrons:
AlecZero
Bob Rosset
Brent M.
Diego Lombeida
Ron Kakar

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PBS Member Stations rely on viewers like you. To support your local station, go to: http://to.pbs.org/DonateOKAY
โ†“ More info and sources below โ†“

You have questions, I have answers!

Richard Feynman - Fun To Imagine (playlist): http://www.youtube.com/watch?v=v3pYRn5j7oI&list=PL2D30B1DEFFDA0310

Mapping a zombie apocalypse to model disease outbreaks: https://medium.com/the-physics....-arxiv-blog/61661d6a

People can't tell the difference between smell of Parmesan and vomit: http://www.rachelherz.com/uplo....ads/Odor_Illusions.p

Check out Ask Joe #1: http://www.youtube.com/watch?v=wkSpmTvCRJA

Joe Hanson - Host and writer
Joe Nicolosi - Director
Amanda Fox - Producer, Spotzen IncKate Eads - Associate Producer
Katie Graham - Director of Photography
Andrew Matthews - Editor and motion graphics

Produced for PBS Digital Studios

-----------
Join us on Patreon!
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Twitter
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Teacherflix
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Viewers like you help make PBS (Thank you ๐Ÿ˜ƒ) . Support your local PBS Member Station here: https://to.pbs.org/PBSDSDonate

Get your Audible trial here: http://audible.com/ok
Tweet this video โ‡’ http://bit.ly/OKTBSzika1 Share on FB โ‡’ http://bit.ly/OKTBSzikaFB
โ†“ More info and sources below โ†“

Get yourself an awesome IOTBS shirt! http://dftba.com/besmart

Follow the latest news on Zika:
https://www.cdc.gov/zika/
http://www.who.int/emergencies/zika-virus/en/

Special thanks to the following for personal interviews about Zika outbreak:

Dr. Peter Hotez - Baylor College of Medicine
Dr. Scott Weaver - UT Medical Branch, Galveston
Dr. Nikos Vasilakis - UT Medical Branch, Galveston
Dr. Dahotra Sarkar - University of Texas at Austin
Dr. Alex Wild - University of Texas at Austin
Mustapha Debboun - Harris County Mosquito Control

References/further reading:

Malaria and Rome: A History of Malaria in Ancient Italy - Robert Sallares
http://www.worldcat.org/oclc/50747841

Sallares, Robert, and Susan Gomzi. "Biomolecular archaeology of malaria."Ancient Biomolecules 3.3 (2001): 195-213.

Sallares, Robert, Abigail Bouwman, and Cecilia Anderung. "The spread of malaria to southern Europe in antiquity: new approaches to old problems."Medical history 48.03 (2004): 311-328.

Hotez, Peter J. "Neglected Tropical Diseases in the Anthropocene: The Cases of Zika, Ebola, and Other Infections." PLoS Negl Trop Dis 10.4 (2016): e0004648.

Hotez, Peter J. "Blue marble health redux: Neglected tropical diseases and human development in the Group of 20 (G20) nations and Nigeria." PLoS Negl Trop Dis 9.7 (2015): e0003672.


Thumbnail image credits:

Aedes aegypti mosquito: CDC/ Prof. Frank Hadley Collins, Dir., Cntr. for Global Health and Infectious Diseases, Univ. of Notre Dame
Zika virus capsid: Manuel Almagro Rivas, Wikimedia Commons

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Have an idea for an episode or an amazing science question you want answered? Leave a comment or check us out at the links below!
Like us on Facebook: http://www.facebook.com/itsokaytobesmart
Follow on Twitter: http://twitter.com/okaytobesmart
http://twitter.com/jtotheizzoe
Follow on Tumblr: http://www.itsokaytobesmart.com
Follow on Instagram: http://instagram.com/jtotheizzoe
Follow on Snapchat: YoDrJoe

-----------------
Itโ€™s Okay To Be Smart is written and hosted by Joe Hanson, Ph.D.
Follow me on Twitter: @jtotheizzoe
Produced by PBS Digital Studios: http://www.youtube.com/user/pbsdigitalstudios

Music via APM
Stock images from SciencePhoto http://www.sciencephoto.com/ and Shutterstock http://www.shutterstock.com
Stock footage from Videoblocks (unless otherwise noted) http://www.videoblocks.com

Teacherflix
0 Views ยท 2 months ago

Viewers like you help make PBS (Thank you ๐Ÿ˜ƒ) . Support your local PBS Member Station here: https://to.pbs.org/PBSDSDonate

Get your Audible trial here: http://audible.com/ok
Tweet this video โ‡’ http://bit.ly/OKTBSzika1 Share on FB โ‡’ http://bit.ly/OKTBSzikaFB
โ†“ More info and sources below โ†“

Get yourself an awesome IOTBS shirt! http://dftba.com/besmart

Follow the latest news on Zika:
https://www.cdc.gov/zika/
http://www.who.int/emergencies/zika-virus/en/

Special thanks to the following for personal interviews about Zika outbreak:

Dr. Peter Hotez - Baylor College of Medicine
Dr. Scott Weaver - UT Medical Branch, Galveston
Dr. Nikos Vasilakis - UT Medical Branch, Galveston
Dr. Dahotra Sarkar - University of Texas at Austin
Dr. Alex Wild - University of Texas at Austin
Mustapha Debboun - Harris County Mosquito Control

References/further reading:

Malaria and Rome: A History of Malaria in Ancient Italy - Robert Sallares
http://www.worldcat.org/oclc/50747841

Sallares, Robert, and Susan Gomzi. "Biomolecular archaeology of malaria."Ancient Biomolecules 3.3 (2001): 195-213.

Sallares, Robert, Abigail Bouwman, and Cecilia Anderung. "The spread of malaria to southern Europe in antiquity: new approaches to old problems."Medical history 48.03 (2004): 311-328.

Hotez, Peter J. "Neglected Tropical Diseases in the Anthropocene: The Cases of Zika, Ebola, and Other Infections." PLoS Negl Trop Dis 10.4 (2016): e0004648.

Hotez, Peter J. "Blue marble health redux: Neglected tropical diseases and human development in the Group of 20 (G20) nations and Nigeria." PLoS Negl Trop Dis 9.7 (2015): e0003672.


Thumbnail image credits:

Aedes aegypti mosquito: CDC/ Prof. Frank Hadley Collins, Dir., Cntr. for Global Health and Infectious Diseases, Univ. of Notre Dame
Zika virus capsid: Manuel Almagro Rivas, Wikimedia Commons

----

Have an idea for an episode or an amazing science question you want answered? Leave a comment or check us out at the links below!
Like us on Facebook: http://www.facebook.com/itsokaytobesmart
Follow on Twitter: http://twitter.com/okaytobesmart
http://twitter.com/jtotheizzoe
Follow on Tumblr: http://www.itsokaytobesmart.com
Follow on Instagram: http://instagram.com/jtotheizzoe
Follow on Snapchat: YoDrJoe

-----------------
Itโ€™s Okay To Be Smart is written and hosted by Joe Hanson, Ph.D.
Follow me on Twitter: @jtotheizzoe
Produced by PBS Digital Studios: http://www.youtube.com/user/pbsdigitalstudios

Music via APM
Stock images from SciencePhoto http://www.sciencephoto.com/ and Shutterstock http://www.shutterstock.com
Stock footage from Videoblocks (unless otherwise noted) http://www.videoblocks.com

Teacherflix
0 Views ยท 2 months ago

PBS Member Stations rely on viewers like you. To support your local station, go to: http://to.pbs.org/DonateOKAY
โ†“ More info and sources below โ†“

You can check out Google's Science Journal app at http://g.co/ScienceJournal

Weโ€™ve all gotten dizzy beforeโ€ฆ but have you ever gotten WEIRD DIZZY? I teamed up with Vanessa Hill from BrainCrat to answer the question โ€œwhy do we get dizzy?โ€ and in the process we learned about some very strange and hilarious ways to get extra-special dizzy! Get ready to learn about your vestibular system, the system that lets you know where your body is in space. You donโ€™t even notice your vestibular system is thereโ€ฆ until it stops working right! #dizzy #neuroscience #vestibular

SUBSCRIBE so you donโ€™t miss a video! โ–บโ–บ http://bit.ly/iotbs_sub

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REFERENCES:

Blakley, B. W., & Siegel, M. (1995). Feeling dizzy: Understanding and treating dizziness, vertigo, and other balance disorders. New York: Macmillan.

Brandt, T. (2003). Vertigo: Its multisensory syndromes (2nd ed.). London: Springer.

Ekdale, E. G. (2016). Form and function of the mammalian inner ear. Journal of Anatomy, 228(2), 324-337.

Hayes, S. H., Dinga, D. Slavia, R. J., & Allman, B. (2013). Chapter 1 - Anatomy and physiology of the external, middle and inner ear. In Handbook of Clinical Neurophysiology (pp. 3-23).

Plishka, C. M. (2015). A clinicianโ€™s guide to balance and dizziness: Evaluation and treatment. Thorofare, New Jersey: SLACK Incorporated.

Steward O. (2000) The Vestibular System. In Functional Neuroscience. Springer, New York, NY.

Welgampola, M. S., Bradshaw, A., & Halmagyi, G. M. (2011). Practical neurology part 4: Dizziness on head movement. Medical Journal of Australia, 195 (9): 518-522. doi: 10.5694/mja11.11001

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Teacherflix
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PBS Member Stations rely on viewers like you. To support your local station, go to: http://to.pbs.org/DonateOKAY
โ†“ More info and sources below โ†“

Head over to Animal IQ on Terra: https://youtu.be/Nc3mUNkJZZk
Celebrate Earth Day with other PBS Channels! https://bit.ly/32nmIsp

Weโ€™re on PATREON! Join the community โ–บโ–บ https://www.patreon.com/itsokaytobesmart
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Ocean currents are our planetโ€™s circulatory system, and they keep everything from ecosystems to the climate healthy. But weโ€™re changing Earth in ways that threaten to disrupt and even break critical ocean currents like the planet-wide Great Ocean Conveyor. This could have devastating effects on our future. In this video, we explain how ocean currents work, how climate change is threatening to disrupt them, and what we can do to stop that from happening.

References: https://sites.google.com/view/....ocean-conveyor-belt/

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Big Thank you to our Brain Trust Patrons:

Andrew Campbell
Robert
Brian Chang
Roy Lasris
Javier Soto
dani bowman
David Johnston
Zenimal
Salih Arslan
Baerbel Winkler
Robert Young
Amy Sowada
Benjamin Teinby
Eric Meer
Peter Ehrnstrom
Dustin
Marcus Tuepker
Karen Haskell
AlecZero


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Twitter
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Follow me to Science Magic Show Hooray! https://www.youtube.com/watch?v=d-idW62ibWQ
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Eating turkey this holiday season? Chowing down on a roast chicken? Youโ€™re eating a dinosaur! Entertain your family and friends with a little science lesson this year, and show them why bird bones tell us that birds are actually living dinosaurs.

Comparative anatomy of dinosaurs and chicken - HHMI https://www.hhmi.org/biointera....ctive/comparative-an

Special thanks to:

Anna Rothschild
Mary Beth Albright and The Washington Post Food Lab
Shaena Montanari, Ph.D.

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PBS Member Stations rely on viewers like you. To support your local station, go to: http://to.pbs.org/DonateOKAY
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No use cleaning... the universe is full of dust. And some of its biggest action is a result of its smallest stuff.

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The Secret Life of Dust by Hannah Holmes: http://amzn.to/1hCuwtT

More dusty science:
Space dust and dirty cars: http://www.itsokaytobesmart.co....m/post/65443038570/s
The Science of Snow: https://www.youtube.com/watch?v=fUot7XSX8uA
The Bodele Depression fertilizes half the Amazon: http://bit.ly/1qAqK6w
From Africa to the Amazon: http://bit.ly/1p4ivm3
More about the Zodiacal Light: http://bit.ly/P15PLW
NASA atmospheric dust and aerosol visualization: http://1.usa.gov/1nn8WKm
Cosmic dust and the birth of our solar system: http://bit.ly/1iPBitH
WHO report on air pollution: http://bit.ly/1jFwTeU
Micrometeorites: http://bit.ly/1eBN9yQ

Thanks to Dr. Don Brownlee for helpful discussion on this episode!

Joe Hanson - Host and writer
Joe Nicolosi - Director
Amanda Fox - Producer, Spotzen IncKate Eads - Associate Producer
Katie Graham - Director of Photography
Andrew Matthews - Editor and motion graphics
John Knudsen - Gaffer

Music:
"Ouroboros" by Kevin MacLeod

Produced for PBS Digital Studios
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A solution to the cancer paradox? Cetacean needed!
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Why do whales, elephants, and other large animals not get cancer? Logically, the larger an animal is, and the longer it lives, the more likely it should be to get cancer. But these giants donโ€™t. Why is that? And can the answer help humanity?

References: https://sites.google.com/view/....besmart-petos-parado

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Check out Weathered: Earthโ€™s Extremes on the PBS app and streaming platforms: https://to.pbs.org/WeatheredB
โ†“โ†“โ†“ More info and sources below โ†“โ†“โ†“

Camouflage is natureโ€™s ultimate game of hide-and-seek, and the secret to winning this game is all in the brain. By studying the masters of disguise, we can see how they trick the brain to make themselves invisible โ€” and what this can teach us about how other animals see and perceive the world

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Follow me to Out of Our Elements! โ–บโ–บ https://www.youtube.com/watch?v=tp-FsXHVFoU
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Youโ€™re alive right nowโ€ฆ at least Iโ€™m pretty sure you are. But youโ€™re not TOTALLY alive. Bits of you are always breaking down, being thrown out, and being replaced. Even right now, parts of you are dying. Some of your cells even died before you were born. And some will never come back. These are all very strange, mildly uncomfortable things to think about. And whatโ€™s even stranger than that is a big fraction of your body is, was, and will never be alive. So how much of you is dead?

References: https://sites.google.com/view/....how-much-of-you-is-a

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Check out America Outdoors Understory on @PBS : https://youtu.be/s-R1p89zHnk
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Youโ€™ve seen it in the comment section before: โ€œClimate change is natural. Itโ€™s happened before and it will keep happeningโ€. In reality, comments like these are the newest kind of climate change denial. In this video weโ€™re going to learn about all the reasons that Earthโ€™s climate changes, natural and otherwise, and then how we know that modern climate change canโ€™t be blamed on natural forces. Maybe we can finally put this biggest myth about climate change in the trash.

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A truly X-cellent and X-ceptional videoโ€ฆ
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Despite being one of the rarest letters in English, the letter X is everywhere. We sign letters with it, we rate movies with it, we name all sorts of things after it. Weโ€™re kind of obsessed with it. And thatโ€™s probably all thanks to math, where X stands for the unknown. Let's explore the bizarre history of how X took on this roleโ€ฆ

References: https://sites.google.com/view/....why-are-we-so-obsess

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Your now is not your forever (unless youโ€™re a tuatara)
Donโ€™t miss our next video! SUBSCRIBE! โ–บโ–บ http://bit.ly/iotbs_sub
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Special thanks to John Green! And to Amber Faasen and the Dallas Zoo herpetarium team!

During the 2017 Project For Awesome livestream, I promised Iโ€™d make a tuatara video if we hit our fundraising goal, and Iโ€™m a man of my word! Little did I know Iโ€™d get to meet a tuatara and learn things about a 200 million year old branch of life that would blow my mind. Get ready to meet the chillest reptile, weird living fossil, and star of Turtles All The Way Downโ€ฆ the tuatara.

3D tuatara skull animation courtesy of Digimorph: http://www.digimorph.org/

READ MORE:
โ€œTurtles All The Way Downโ€ by John Green: http://amzn.to/2GU2c6J

โ€œHorseshoe Crabs and Velvet Worms: The Story of the Animals and Plants That Time Has Left Behindโ€ by Richard Fortey http://amzn.to/2EpcfT2

Hay, J. M., Subramanian, S., Millar, C. D., Mohandesan, E., & Lambert, D. M. (2008). Rapid molecular evolution in a living fossil. Trends in Genetics, 24(3), 106-109.

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Itโ€™s Okay To Be Smart is hosted by Joe Hanson, Ph.D.
Director: Joe Nicolosi
Writer: Joe Hanson, Ph.D.
Creative Director: David Schulte
Editor/animator: Derek Borsheim
Producer: Stephanie Noone and Amanda Fox

Produced by PBS Digital Studios
Music via APM
Stock images from Shutterstock http://www.shutterstock.com

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Viewers like you help make PBS (Thank you ๐Ÿ˜ƒ) . Support your local PBS Member Station here: https://to.pbs.org/PBSDSDonate

The book:
โ€œThe Fly Trapโ€ by Fredrik Sjรถberg http://amzn.to/1TlWrkw

Have an idea for an episode or an amazing science question you want answered? Leave a comment or check us out at the links below!

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Music:
Monkeys Spinning Monkeys Kevin MacLeod (incompetech.com)
Licensed under Creative Commons: By Attribution 3.0 License
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