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Tweet ⇒ http://bit.ly/OKTBSplacebos Share on FB ⇒ http://bit.ly/OKTBSplaceboFB
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How does the placebo effect work? Here's how your brain tricks itself when it comes to medicine

Follow me to Reactions to learn what is (and isn’t) in those vitamin supplements: https://youtu.be/9gQoG0AT3kY

We’ve got t-shirts! Get yours here: http://store.dftba.com/collect....ions/its-okay-to-be-

References:
Niemi, M. B. (2009). Placebo Effect: A Cure in the Mind: Scientific American.Placebo Effect: A Cure in the Mind: Scientific American.

Price, D. D., Finniss, D. G., & Benedetti, F. (2008). A comprehensive review of the placebo effect: recent advances and current thought. Annu. Rev. Psychol.,59, 565-590.

Finniss, D. G., Kaptchuk, T. J., Miller, F., & Benedetti, F. (2010). Biological, clinical, and ethical advances of placebo effects. The Lancet, 375(9715), 686-695.

Marchant, J. (2015). Strong placebo response thwarts painkiller trials. Nature News http://www.nature.com/news/str....ong-placebo-response

Dr. Ben Goldacre's book "Bad Science" http://amzn.to/1TZ5WUE

Harold Pashler "Encyclopedia of the Mind" http://amzn.to/1HT7RJ4

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
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It’s Okay To Be Smart is written and hosted by Joe Hanson, Ph.D.
Follow me on Twitter: @jtotheizzoe
Email me: itsokaytobesmart AT gmail DOT com
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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 Inc.
Kate Eads - Producer
Andrew Matthews - 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 (unless otherwise noted)

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Life’s been around on Earth for at least 3.7 billion years. But for most of that time, it was incredibly boring — just simple little cells squirming around in water. It only got interesting in the last few hundred million years. And that might never have happened without the help of a deadly, but also life-giving, element.

References: https://sites.google.com/view/....great-oxygenation-re

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Why do we see rainbows in soap bubbles? What makes an oil slick so oddly beautiful? Iridescent colors, which transform depending on the angle you look at them, are all over nature. How does physics make these shifting rainbows? We’re going to find out with the help of the National Museum of Natural History's most spectacular specimens – from bird feathers and beetle wings to fossils and gemstones.

Check out some of my other videos about color in nature:
In search of the blackest thing on Earth https://youtu.be/86P03RlegBM
Why is blue so rare in nature? https://youtu.be/3g246c6Bv58

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If you traced your family tree back 185 million generations through evolution, you wouldn't be looking at a human, a primate, or even a mammal. You'd be looking at a fish. So where along that line does the first human show up? The answer may surprise you!

Inspired by Richard Dawkins' "The Magic of Reality" http://amzn.to/1eFPE0v
Also check out Richard Dawkins' "The Ancestor's Tale" http://amzn.to/1fbf17e

Images of prehistoric species used in this episode:
Tiktaalik, Procunsul, Plesiadapsis, Juramaia, Hylonomus - by Nobu Tamura (http://spinops.blogspot.com/)
Homo erectus (by Tim Evanson) http://bit.ly/1uwI5zu

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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Another YouTube #shorts from Dr. Joe! Subscribe for more fun science stories.

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The famous painter who was half-honeybee
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Claude Monet had a very unique eye, and it can teach us a bit about the science of vision
More reading:

Monet's Eye at Download the Universe:
http://www.downloadtheuniverse.....com/dtu/2012/04/mon

Simulation of Monet's Cataracts:
http://archopht.jamanetwork.co....m/article.aspx?artic

More:
http://petapixel.com/2012/04/1....7/the-human-eye-can-
http://www.skepticalartist.com..../2013/06/25/claude-m

Music:
Johann Sebastian Bach - Goldberg Variations

(From The Open Goldberg Variations, by Kimiko Ishizaka
-----------------

Have an idea for an episode or an amazing science question you want answered? Leave a comment below!

Follow me on Twitter: @jtotheizzoe
Email me: itsokaytobesmart AT gmail DOT com
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For more awesome science, check out: http://www.itsokaytobesmart.com

Joe Hanson - Host and writer
Joe Nicolosi - Director
Amanda Fox - Producer, Spotzen Inc
Kate Eads - Associate Producer
Katie Graham - Director of Photography
Andrew Matthews - Editor and motion graphics
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Produced for PBS Digital Studios
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Last week's video:
The Science of Snowflakes: http://www.youtube.com/watch?v=fUot7XSX8uA

More videos:
The Universe In A Glass of Wine: https://www.youtube.com/watch?v=b3_n7TDL7lc
Why We Cook: http://www.youtube.com/watch?v=Wpfwu__PF7Y
Ghosts of Evolution: https://www.youtube.com/watch?v=ZWW5OuxlKec

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The biggest thing that has ever lived on Earth… is a tree? Hard to believe, but it’s true. Travel with me to the Rocky Mountains of Colorado to go inside a giant aspen clone, the most massive species on our planet, and learn what unique and special evolutionary adaptations let them get so big.

Thanks to Dr. Jeffry B. Mitton (UC-Boulder) for sharing his years of research into giant quaking aspens and for telling us where to go see such pretty fall colors

References:

Mitton, J. B. & Grant, M. C. Observations on the Ecology and Evolution of Quaking Aspen, Populus tremuloides, in the Colorado Front Range. 9 (2021).

Mitton, J. B. & Grant, M. C. Genetic Variation and the Natural History of Quaking Aspen. BioScience 46, 25–31 (1996).

Grant, M. C., Mitton, J. B. & Linhart, Yan. B. Even larger organisms. Nature 360, 216–216 (1992).

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It’s the Great American Read!
Vote for America's favorite novel: https://to.pbs.org/2Jes2X5
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English is a confusing language for many reasons. But the irregular verbs might be the most confusing part. Why is “told” the past tense of “tell” but “smold” isn’t the past tense of “smell”? It turns out that the study of irregular verbs can teach us a lot about how languages evolve. This week, we look at how the era of Big Data is unlocking secrets behind the weirdness of words.

OTHER VIDEOS TO CHECK OUT:
“The Zipf Mystery” - Vsauce https://youtu.be/fCn8zs912OE
“Trending Artists of the 17th Century” - The Art Assignment https://youtu.be/7eq3D9Q9lUA

REFERENCES:

Uncharted: Big Data as a Lens on Human Culture - Erez Aiden and Jean-Baptiste Michel https://amzn.to/2MLBEHF

Words and Rules - Steven Pinker https://amzn.to/2vKL1kf

Lieberman, Erez, et al. "Quantifying the evolutionary dynamics of language." Nature 449.7163 (2007): 713.

Michel, Jean-Baptiste, et al. "Quantitative analysis of culture using millions of digitized books." Science (2010): 1199644.

Hanley, M. L., Joos, M., & Fein, T. (1937). Word index to James Joyce's Ulysses. Madison: University of Wisconsin Press.

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It’s Okay To Be Smart is hosted by Joe Hanson, Ph.D.
Writer: Joe Hanson
Creative Director/Director: David Schulte
Editor/animator: Derek Borsheim
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It's not the size of the month that matters…
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Why does February have 28 days when all the other months get 30 or 31? The answer is part superstition, part politics, and parts astronomy. (Basically, it's the Romans' fault)

Special thanks to Dr. Jen Ebbeler from the University of Texas Classics department for walking me through the history of the Roman calendar
REFERENCES AND FURTHER READING:

Wikipedia's "Roman Calendar" page is really good http://en.wikipedia.org/wiki/Roman_calendar
More:
http://penelope.uchicago.edu/T....hayer/E/Roman/Texts/
http://penelope.uchicago.edu/~....grout/encyclopaedia_
http://penelope.uchicago.edu/~....grout/encyclopaedia_


Have an idea for an episode or an amazing science question you want answered? Leave a comment below!
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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
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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
Dalton Allen - Post-Production Intern

Theme music:
"Ouroboros" by Kevin MacLeod

Other music via APM

Stock images from Shutterstock

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

Last week's video:
Why Vaccines Work https://www.youtube.com/watch?v=3aNhzLUL2ys

More videos:
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
Why Did We Blow on NES Games? https://www.youtube.com/watch?v=4Gf9mtXnJfM
The Science of Game of Thrones - https://www.youtube.com/watch?v=Utu-LpJn3Is
There Was No First Human - https://www.youtube.com/watch?v=xdWLhXi24Mo

PBS Member Stations rely on viewers like you. To support your local station, go to: http://to.pbs.org/DonateOKAY
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You have questions, I have answers.

SUBSCRIBE, it's FREE! http://bit.ly/iotbs_sub

Sequencing the banana genome: http://news.discovery.com/eart....h/plants/banana-geno

Reddit's r/ELI5 on "sympathetic vomiting": http://www.reddit.com/r/explai....nlikeimfive/comments

Chances we had more than one common ancestor: http://news.discovery.com/anim....als/dinosaurs/life-s

Greenland fossil microbes: http://www.nature.com/ngeo/jou....rnal/v7/n1/full/ngeo

Australia fossil microbes: http://online.liebertpub.com/d....oi/abs/10.1089/ast.2

Ed Yong's awesome article about the origin of the mitochondria: http://nautil.us/issue/10/merg....ers--acquisitions/th

History of "c" as the speed of light: http://math.ucr.edu/home/baez/....physics/Relativity/S

Ask Joe #1: http://www.youtube.com/watch?v=wkSpmTvCRJA
Ask Joe #2: https://www.youtube.com/watch?v=TJvWQMt95A8

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

Produced for PBS Digital Studios
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Your brain is hungry. Here's how to feed it.

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Ever wonder why we cook our food? We do it because it tastes good, of course, and because our customs and traditions are built around it. But we also cook our food for some basic biological reasons, because of evolution. Some scientists think that figuring out how to cook actually MADE us human!

If conversation gets a little dry around your holiday table, now you'll have some awesome science to share with everyone!

Richard Wrangham - "Catching Fire: How Cooking Made Us Human" http://amzn.to/1cg5flN

"The Raw and the Stolen" (PDF) - Richard Wrangham et al. http://bit.ly/JTLYfe
(that one has some of the counterarguments, too)
Greg Laden's summary: http://bit.ly/1dx46oc

Cooked Foods Needed for Early Human Brain: http://bit.ly/1l8bqJE

Man Entered the Kitchen 1.9 Million Years Ago: http://bit.ly/1c1vcB5

What made us human: http://bit.ly/19lp4cU and http://www.epjournal.net/wp-co....ntent/uploads/EP0834

The story might not be quite so simple, though: http://blogs.plos.org/neuroant....hropology/2010/10/28

Joe Hanson - Host
Joe Nicolosi - Director
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Kate Eads - Production Manager
Intro music - Victor Herbert Orchestra, "Chinese Dance of the Mirillitons from the Nutcracker 1913"
Body music - Podington Bear's "AlgoRhythmNatural"
Special thanks to Thinkery Austin

Produced for PBS Digital Studios
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Go to http://Raceforretirement.com and see how the action gap affects you.
Tweet this video ⇒ http://bit.ly/OKTBStraf Share on FB ⇒ http://bit.ly/OKTBStrafFB
↓ More info and sources below ↓

CGP Grey "The Simple Solution to Traffic" https://youtu.be/iHzzSao6ypE
ASAPscience "How Not To Get Stuck In Traffic" https://youtu.be/APkpiO0QQ_k

Book recommendation! "Traffic: Why We Drive the Way We Do" by Tom Vanderbilt http://amzn.to/2durlGP

References:
INRIX 2015 traffic stats: http://inrix.com/scorecard/key-findings-us/

Couzin, Iain D., and Nigel R. Franks. "Self-organized lane formation and optimized traffic flow in army ants." Proceedings of the Royal Society of London B: Biological Sciences 270.1511 (2003): 139-146.

Fourcassié, Vincent, Audrey Dussutour, and Jean-Louis Deneubourg. "Ant traffic rules." Journal of Experimental Biology 213.14 (2010): 2357-2363.

Hönicke, C., P. Bliss, and R. F. A. Moritz. "Effect of density on traffic and velocity on trunk trails of Formica pratensis." The Science of Nature 102.3-4 (2015): 1-9.

Larson, Richard C. "There's More to a Line than its Wait." Technology Review 91.5 (1988): 60-67.

Maister, David H. The psychology of waiting lines. Harvard Business School, 1984.

Perna, Andrea, et al. "Individual rules for trail pattern formation in Argentine ants (Linepithema humile)." PLoS Comput Biol 8.7 (2012): e1002592.

----------------
It'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!
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Dire wolves are back—sort of. Colossal Biosciences seems to have resurrected this extinct predator, but it's not quite as simple as that. Joe talks with their scientists to explore the truth, tech, and ethics of “de-extinction.”

Learn more about Colossal Biosciences @Colossal : https://www.youtube.com/@Colossal
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Chapters:
0:00 Help Protect Public Media
0:28 Intro - The first de-extinction?
2:38 Are these ACTUALLY dire wolves?
4:15 Functional de-extinction and "proxy" species
7:58 What IS a species anyway?
10:48 But wait, isn't their ecosystem extinct too?
15:33 Will Colossal share this technology?
16:33 Artificial wombs and more
18:25 Should we solve other environmental problems first?
21:16 Could this be misused or abused?
23:42 Should we be doing this?
25:24 Conclusion



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You know you’ve wondered. Do fish actually pee? And what does that make the ocean… one big toilet?


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It’s Okay To Be Smart is hosted by Joe Hanson, Ph.D.
Director: Joe Nicolosi
Writer: Sarah Keartes
Creative Director: David Schulte
Editor/animator: Derek Borsheim and Sara Roma
Producers: Stephanie Noone and Amanda Fox

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You asked for it, so here’s the follow-up!
Just because something is difficult doesn’t mean it’s impossible. Over the past centuries, archaeologists, historians, and engineers have reconstructed a great deal of the technology and science used to build the Egyptian pyramids. This week we look at ancient Egyptian mathematics, building techniques, tools, and culture to reconstruct the Great Pyramid’s construction.

REFERENCES:

Fall, Abdoulaye, et al. "Sliding friction on wet and dry sand." Physical review letters 112.17 (2014): 175502.

Lehner, M. (1997). The complete pyramids. Thames and Hudson.

Parry, D. (2005). Engineering the pyramids. The History Press.

Smith, Craig B., Zahi Hawass, and Mark Lehner. How the great pyramid was built. Harper Collins, 2006.

Verner, M. (2003). The pyramids: their archaeology and history. Atlantic.

Verner, M. (2007). The Pyramids: The Mystery, Culture, and Science of Egypt's Great Monuments. Grove/Atlantic, Inc..


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It’s Okay To Be Smart is hosted by Joe Hanson, Ph.D.
Director: Joe Nicolosi
Writer: Joe Hanson
Producer/editor/animator: Andrew Orsak
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 😃) . Support your local PBS Member Station here: https://to.pbs.org/PBSDSDonate

Follow me to Vsauce3!! http://bit.ly/1zUxn7a
Twitter: @okaytobesmart @jtotheizzoe Instagram: @jtotheizzoe
↓ More info and sources below ↓

Will artificial intelligence ever surpass human intelligence? And if that happens, will AI be good or bad? Is evil AI like we see in Avengers: Age of Ultron… inevitable?

READ THIS FOR MORE:
Wait But Why: The Road To Superintelligence
Part 1: http://waitbutwhy.com/2015/01/....artificial-intellige
Part 2: http://waitbutwhy.com/2015/01/....artificial-intellige

The smiley face thought experiment is my take on the famous "paperclip maximizer", read more about it here: http://wiki.lesswrong.com/wiki/Paperclip_maximizer

Special thanks to Jake from Vsauce3!

Have an idea for an episode or an amazing science question you want answered? Leave a comment below!
Follow on Twitter: http://twitter.com/okaytobesmart
http://twitter.com/jtotheizzoe
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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
Dan Silver - Production Assistant
Dalton Allen - Post-Production Intern

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:
Superbugs: The Empire Strikes Bacteria https://www.youtube.com/watch?v=fyRyZ1zKtyA

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

You can learn more at https://curiositystream.com/smart
Go check out Sound Field! http://bit.ly/2HH9sG1
SUBSCRIBE so you don’t miss a video! ►► http://bit.ly/iotbs_sub

More people have food allergies than ever before. Peanuts, tree nuts, shellfish, eggs, and even milk… the list of possibly dangerous foods seems to get longer every day. But why do some people’s bodies have deadly reactions food? And why are food allergies on the rise? In this video we explain what food allergies really are, and what the difference is between food allergy and food intolerance. Some fellow YouTubers tell us their stories of what it’s like to live with food allergies, and we bring you the best current science on how to prevent food allergies in kids and adults. It’s a tough nut to crack. #FoodAllergy #Allergies #FoodScience

Special thanks to WheezyWaiter and Emily Graslie for sharing their food allergy stories with us!
https://www.youtube.com/user/wheezywaiter
https://www.youtube.com/user/thebrainscoop

Want to learn more about allergies? Watch this: https://www.youtube.com/watch?v=sqrnShjM4II

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REFERENCES:
Anagnostou, Katherine, and Andrew Clark. "Oral immunotherapy for peanut allergy." Annual review of medicine 67 (2016): 375-385.

Sathe, S. K., Liu, C., & Zaffran, V. D. (2016). "Food allergy." Annual review of food science and technology, 7, 191-220.

Tyagi, Nidhi, et al. "Comparisons of allergenic and metazoan parasite proteins: allergy the price of immunity." PLoS computational biology 11.10 (2015): e1004546.

Willits, Erin K., et al. "Food Allergy: A Comprehensive Population-Based Cohort Study." Mayo Clinic Proceedings. Vol. 93. No. 10. Elsevier, 2018.

Wong, L., Huang, C. H., & Lee, B. W. (2016). "Shellfish and house dust mite allergies: is the link tropomyosin?." Allergy, asthma & immunology research, 8(2), 101-106.

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Behold the COSMOTRON 5000!!!

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

Subscribe to It's Okay To Be Smart: http://bit.ly/iotbs_sub

How to build your own cloud chamber particle detector and test relativity at home: http://www.fromquarkstoquasars.....com/make-a-cosmic-r

Carl Sagan discusses cosmic radiation and the origin of life in "Cosmic Connection": http://amzn.to/1wiHIsu

Learn about muons, time dilation, and relativity: http://cosmic.lbl.gov/SKliewer..../Cosmic_Rays/Muons.h

Produced for PBS Digital Studios

Joe Hanson - Host and writer
Joe Nicolosi - Director
Amanda Fox - Producer, Spotzen IncKate Eads - Associate Producer
Katie Graham - Director of Photography
Andrew Matthews - Editing/Motion Graphics
John Knudsen - Gaffer
Dalton Allen - Post-production Intern

Theme music:
"Ouroboros" by Kevin MacLeod

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Just be yourself! Or be your other self. Whichever.
Subscribe: http://bit.ly/iotbs_sub Twitter: @okaytobesmart
↓ More info and sources below ↓

Is the science of Orphan Black realistic? Could we clone humans, or engineer them to have customized traits? We take a look at today's genetic engineering technologies to find out if designer babies and human cloning is, or should be, a reality
BOOKS! For more on the modern science of cloning and genetic modification, read the book "Frankenstein's Cat" by Emily Anthes: http://amzn.to/1zsVizw

Chinese scientists have edited the genome of human embryos (sadly this news came out after we had filmed):
http://www.theverge.com/2015/4..../23/8477491/human-ge
How CRISPRs work: https://www.youtube.com/watch?v=2pp17E4E-O8
Scientists call for a moratorium on human gene editing: http://www.nytimes.com/2015/03..../20/science/biologis
Three-parent babies: http://www.nytimes.com/2014/06..../29/magazine/the-bra


Have an idea for an episode or an amazing science question you want answered? Leave a comment below!
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

-----------------
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
Dalton Allen - Post-Production Intern

Theme music:
"Ouroboros" by Kevin MacLeod

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

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

Last week's video:
Is Ultron Inevitable? https://www.youtube.com/watch?v=-Irmtk5QG8s

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