Thank you to Policygenius for supporting PBS. To learn more, go to https://Policygenius.com/BeSmart
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Optical illusions are fun, but they can also teach us a lot about how our brains work. In particular, how our brains accomplish the incredible feat of constructing a three-dimensional reality using nothing but 2-D images from our eyes. A young artist and psychology researcher named Adelbert Ames, Jr. developed a series of illusions that help us understand how this process of constructing reality actually works. Sometimes we need to be fooled in order to gain understanding.

We'd like to acknowledge Dr. Phil Kellman from UCLA for his helpful discussions about the principles of spatial perception at play in these illusions https://kellmanlab.psych.ucla.edu/

Special thanks to Brian from Real Engineering for 3D printing the anamorphic cube for me! https://www.youtube.com/c/RealEngineering

References used in this episode: https://sites.google.com/view/....references-ames-illu

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Why do Africa and South America fit together? Anyone who’s ever looked at a map can see that Earth’s continents are kind of like a jigsaw puzzle. The idea that continents are constantly moving and weren’t always in their current spots is a pretty obvious idea, right? You might be surprised to learn that geologists only accepted that idea recently in the past few decades, and it figuring out how plate tectonics and continental drift work required some pretty strange evidence.

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LEARN MORE:
Some background on Alfred Wegener: http://www.ucmp.berkeley.edu/geology/techist.html

Lystrosaurus (ancient mammal relative): https://en.wikipedia.org/wiki/Lystrosaurus

Glossopteris (ancient fern): https://en.wikipedia.org/wiki/Glossopteris

The splitting of Africa: http://theconversation.com/spl....itting-africa-what-h

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It’s Okay To Be Smart is hosted by Joe Hanson, Ph.D.
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Check out Hungry Planet on @pbsterra https://youtu.be/uH2jWc9TEVM
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The idea of the lone genius creating everything isn’t just misleading. It’s harmful and wrong. Innovation thrives when people work together, and rather than nice linear paths, new ideas come from chance events and unexpected connections. This video tells the story of one such invention, and offers a new idea about how new ideas are really born.

0:00 I've got a gripe
1:30 How innovation stories usually go
2:28 The last time this happened, things got weird
2:51 Stabbing sick people in Olde London
4:23 A heroic cow named Blossom
5:05 Why Napoleon hated swamps
6:22 The preacher, sparks, and a fortuitous explosion
7:08 Who's "in charge" here?
8:26 Bubbles, for your health!
9:33 Putting the club in soda
10:13 Needles and drugs
11:01 A tower in Paris
11:58 Quantum bros
12:53 Very VERY tiny things
13:37 This physicist hates cats
14:20 Mr. Helix and the messengers
15:18 It's all coming together
16:08 The best part of the story
17:35 Extras

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The cutest conservation story ever? Maybe.
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Special thanks to Dr. Donna Shaver and the Padre Island National Seashore Division of Sea Turtle Science and Recovery for having us!
Andrés Herrera film courtesy of Dr. Thane Wibbels - University of Alabama at Birmingham

References/Learn More:

Bevan, E., et al. "Estimating the historic size and current status of the Kemp's ridley sea turtle (Lepidochelys kempii) population." Ecosphere 7.3 (2016).

Johnsen, Sönke, and Kenneth J. Lohmann. "The physics and neurobiology of magnetoreception." Nature Reviews Neuroscience 6.9 (2005): 703-712.

Lohmann, Kenneth J., Nathan F. Putman, and Catherine MF Lohmann. "Geomagnetic imprinting: a unifying hypothesis of long-distance natal homing in salmon and sea turtles." Proceedings of the National Academy of Sciences105.49 (2008): 19096-19101.

Lohmann, Kenneth, and Catherine Lohmann. "Detection of magnetic inclination angle by sea turtles: a possible mechanism for determining latitude." Journal of Experimental Biology 194.1 (1994): 23-32.

Putman, Nathan F., et al. "Evidence for geomagnetic imprinting as a homing mechanism in Pacific salmon." Current Biology 23.4 (2013): 312-316.

Shaver, Donna J., and Charles W. Caillouet Jr. "Reintroduction of Kemp's ridley (Lepidochelys kempii) sea turtle to Padre Island National Seashore, Texas and its connection to head-starting." Herpetological Conservation and Biology 10.1 (2015): 378-435.

Ueda, H. "Physiological mechanisms of imprinting and homing migration in Pacific salmon Oncorhynchus spp." Journal of fish biology 81.2 (2012): 543-558.

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You're gonna lobe this video
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Are you a left-brained person or a right-brained person? Spoiler: You're neither. Each of us uses both sides of our brain for most of what we do. But still, there are a number of brain functions that do show lateralization, where they are localized to one side or another. Why is this? And how does it influence our definition of consciousness? People with "split brains" can help us figure it out.

Special thanks to Dr. Michael Gazzaniga for his help researching this video!
Here's a wonderful vintage film featuring Dr. Gazzaniga's early split brain work: https://archive.org/details/splitbrain

-----------
READ MORE:

Gazzaniga, Michael S. "Forty-five years of split-brain research and still going strong." Nature reviews. Neuroscience 6.8 (2005): 653.
http://bit.ly/2ymOh55

Gazzaniga, Michael S. "The split-brain: Rooting consciousness in biology." Proceedings of the National Academy of Sciences 111.51 (2014): 18093-18094.
http://bit.ly/2yoacZo

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It's Okay To Be Smart is hosted by Joe Hanson, Ph.D.
Director: Joe Nicolosi
Writer: Shaena Montanari, Ph.D.
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Producer: Stephanie Noone and Amanda Fox

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

Go to http://Raceforretirement.com and see how the action gap affects you.
Follow all of our Peru adventures on this playlist: http://bit.ly/SmartPeru
↓ More info and sources below ↓

Special thanks to Rainforest Expeditions for hosting us! Visit http://www.perunature.com/

References:
Wilson, E.O. "The Diversity of Life" http://eowilsonfoundation.org/....the-diversity-of-lif

Eichhorn, Markus P. "Latitudinal gradients." Natural Systems: The organisation of life: 249-264.

"Tropical Ecology" (textbook) by John Kircher (2011) http://press.princeton.edu/titles/9486.html

Condamine, Fabien L., et al. "What causes latitudinal gradients in species diversity? Evolutionary processes and ecological constraints on swallowtail biodiversity." Ecology letters 15.3 (2012): 267-277.

Jenkins, Clinton N., Stuart L. Pimm, and Lucas N. Joppa. "Global patterns of terrestrial vertebrate diversity and conservation." Proceedings of the National Academy of Sciences 110.28 (2013): E2602-E2610.

Mannion, Philip D., et al. "The latitudinal biodiversity gradient through deep time." Trends in ecology & evolution 29.1 (2014): 42-50.

Mittelbach, Gary G., et al. "Evolution and the latitudinal diversity gradient: speciation, extinction and biogeography." Ecology letters 10.4 (2007): 315-331.

Wiens, John J., et al. "Evolutionary and ecological causes of the latitudinal diversity gradient in hylid frogs: treefrog trees unearth the roots of high tropical diversity." The American Naturalist 168.5 (2006): 579-596.


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And where do they keep their suitcases?

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As winter approaches, V-shaped flocks glide overhead as the world's birds begin their long treks to warmer climates. Humans used to have some pretty crazy theories about where birds went for winter, like the moon, or to the bottom of the ocean.

How did we learn the real story? And where DO birds go for winter? What are the longest bird migrations? How do birds store up energy for their long journey? How do birds navigate? Why do they fly in a V-shape?

Find out in this week's video!

Charles Morton's theory of birds on the moon: http://wrd.cm/1xMKc5k
Read Charles Morton's original 1703 pamphlet! http://bit.ly/1C5AKhk
The story of the stork with a spear in its neck: http://bit.ly/11PgkIs
Aristotle's theory of bird transmutation: http://bit.ly/1uwQwHX
The "barnacle goose" http://bit.ly/1C5BiUg

The Arctic tern's record-breaking migration: http://www.ncbi.nlm.nih.gov/pm....c/articles/PMC283666
The bar-tailed godwit's fat-fueled migration: https://sora.unm.edu/sites/def....ault/files/journals/
Ruby-throated hummingbird mighty migration: http://www.ncbi.nlm.nih.gov/pm....c/articles/PMC132505

The avian aerodynamics of the "flying V" http://bit.ly/1vFFlUs
The many senses that birds use to find their way: http://bit.ly/11qN9vr
How birds use magnetic fields to navigate: http://bit.ly/1r2jYLy

Produced for PBS Digital Studios

Joe Hanson - Host/Writer
Joe Nicolosi - Director
Amanda Fox - Producer, Spotzen IncKate Eads - Associate Producer
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Dalton Allen - Post-production intern
John Knudsen - Gaffer

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"Ouroboros" by Kevin MacLeod

Stock images by Shutterstock

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"The Oldest Living Things In The World" by Rachel Sussman:
Amazon: http://amzn.to/1uZ6wJp
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Species featured in this video:

Bristlecone pine: http://bit.ly/1o3zW4p
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Pando: http://bit.ly/1tLlRLU
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Llareta: http://bit.ly/1ANGYPC
Black coral: http://bit.ly/1zLWn1s
Barrel sponge: http://bit.ly/1opvDjb
Posidonia sea grass: http://bit.ly/UVoN9u
Pond cypress: http://bit.ly/1okVPY6
"Old Tjikko" spruce: http://bit.ly/1s30eq7
Stromatolites: http://bit.ly/1pyymXs
Siberian Actinobacteria: http://bit.ly/1xUZ5yR

Joe Hanson - Host and writer
Joe Nicolosi - Director
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Gaffer - John Knudsen

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Produced for PBS Digital Studios

Unless otherwise indicated, all photos are © Rachel Sussman, used with permission

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Now you "sea" them, now you don't! Cuttlefish are more than the chameleons of the sea, these cephalopods take camouflage to a whole new level.

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It's Okay To Be Smart is written and hosted by Joe Hanson, Ph.D
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The eyes are often the first thing we see when we look at someone. And when you look at them up close, everyone’s eye color is a kaleidoscope of shapes and hues. How does eye color work? The answer involves some very cool physics, and probably isn’t what you were taught in school. And you’ve probably wondered how is eye color inherited, or why some people have blue eyes even if their parents’ eyes are brown? Get ready for a long look deep into the genetics and physics of eye color. #eyes #eyecolor #blueeyes

REFERENCES:

Genetics of human iris colour and patterns - Richard A. Sturm, Mats Larsson
https://onlinelibrary.wiley.co....m/doi/full/10.1111/j

Iris Color Classification Scales
https://www.ncbi.nlm.nih.gov/p....mc/articles/PMC57292

GWAS Findings for Human Iris Patterns: Associations with Variants in Genes that Influence Normal Neuronal Pattern Development
https://www.ncbi.nlm.nih.gov/p....mc/articles/PMC31551

Characterization of melanin in human iridal and choroidal melanocytes from eyes with various colored irides.
https://www.ncbi.nlm.nih.gov/pubmed/18353148

Can blue eyed parents produce brown eyed children? - Richard A. Sturm
https://bioenv.gu.se/digitalAs....sets/1571/1571499_ey


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I took a trip to one of Austin's famous moontowers so I could put the enormity of our solar system into perspective. With the help of a grapefruit, and a lot of walking, you'll get an idea of just how tiny everything is out there!!

Do it yourself! Calculate sizes and distances, and then make your own solar system model using this calculator: http://dft.ba/-solarsystem

Veritasium "How Far Away Is The Moon?" http://youtu.be/Bz9D6xba9Og
Solar system as a football field: http://dft.ba/-6qnn
How far away is Voyager right now? http://voyager.jpl.nasa.gov/

Written and hosted by Joe Hanson
Produced by Painted On Productions (http://www.paintedon.com/)

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What is this? A forest for ANTS?! Deep Look: https://youtu.be/fguo3HvWjb0
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Follow Aaron Pomerantz: http://www.thenextgenscientist.com/
Twitter: @aaronpomerantz

Special thanks to Dr. Corrie Moreau from The Field Museum for helpful discussions while we were making this episode!

References/Learn More:

Edwards, David P., et al. "A plant needs ants like a dog needs fleas: Myrmelachista schumanni ants gall many tree species to create housing." The American Naturalist 174.5 (2009): 734-740.

Frederickson, Megan E. "Conflict over Reproduction in an Ant‐Plant Symbiosis: Why Allomerus octoarticulatus Ants Sterilize Cordia nodosa Trees." The American Naturalist 173.5 (2009): 675-681.

Frederickson, Megan E., and Deborah M. Gordon. "The intertwined population biology of two Amazonian myrmecophytes and their symbiotic ants." Ecology 90.6 (2009): 1595-1607.

Haddad Junior, Vidal, Luiz Roberto Hernandes Bicudo, and Adílson Fransozo. "The Triplaria tree (Triplaris spp) and Pseudomyrmex ants: a symbiotic relationship with risks of attack for humans." Revista da Sociedade Brasileira de Medicina Tropical 42.6 (2009): 727-729

Heil, Martin, et al. "Partner manipulation stabilises a horizontally transmitted mutualism." Ecology letters 17.2 (2014): 185-192.

Hölldobler, Bert, and Edward O. Wilson. The ants. Harvard University Press, 1990.

Sanchez, Adriana, and Edwin Bellota. "Protection against herbivory in the mutualism between Pseudomyrmex dendroicus (Formicidae) and Triplaris americana (Polygonaceae)." Journal of Hymenoptera Research 46 (2015): 71.

Solano, Pascal-Jean, Monique Belin-Depoux, and Alain Dejean. "Formation and structure of food bodies in Cordia nodosa (Boraginaceae)." Comptes rendus biologies 328.7 (2005): 642-647.

Yu, Douglas W., and Naomi E. Pierce. "A castration parasite of an ant–plant mutualism." Proceedings of the Royal Society of London B: Biological Sciences 265.1394 (1998): 375-382.

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It’s Okay To Be Smart is written and hosted by Joe Hanson, Ph.D.
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The fastest animal in nature isn't what you think it is. It's way, way smaller than that. Nature's tiniest creatures warp the laws of physics, and they do it in ways that even human engineers would gawk at. Using the power of super slow-motion macro video, let's uncover the biological engineering that lets nature's fastest creatures do their zoomy thing.

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References: https://sites.google.com/view/....fastest-animals-refe

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Are humans really Earth’s most dominant species? Let’s put all of the planet’s living things on a scale and see what has amassed the most mass. This week we break down the concept of “biomass” to judge Earth’s living things from top to bottom, and see how humans have changed the world.

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References:

Bar-On, Y. M., Phillips, R., & Milo, R. (2018). The biomass distribution on Earth. Proceedings of the National Academy of Sciences, 201711842.

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Every year, hundreds of millions of people voluntarily turn their lives upside down by setting their clocks forward one hour in the spring and back one hour in the autumn on a particular date mandated by the government wherever they happen to live. Daylight saving time is a perfect example of how a few people with the best of intentions can end up annoying millions of the rest of us for the better part of a century. And it’s time we take an honest look at how we got to this place where half the world comes unstuck in time twice a year, and ask if the supposed advantages for springing forward and falling back still hold up! #daylightsavingtime #DST

References: https://sites.google.com/view/....fixing-daylight-savi

My video about the invention of metric system: https://www.youtube.com/watch?v=e3eHHwcMVcA

Special thanks to our Brain Trust Patrons:
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Counting stars from the shore of the cosmic ocean…
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↓ More info and sources below ↓

LIKE THE SHIRT I'M WEARING? It's glow in the dark! You can get it here (along with space undies and other good stuff): https://www.etsy.com/shop/makeitgoodpdx

How many stars are there in the universe? Are there more stars out there than grains of sand on Earth? Thanks to advanced space telescopes, we've been able to peer farther into deep time and the distant universe than we ever thought possible, and we might finally be able to answer these mind-boggling questions
Every star visible from Earth (naked eye): http://en.wikipedia.org/wiki/Bright_Star_Catalogue
Number of stars in the universe (estimated): http://www.universetoday.com/1....02630/how-many-stars
Hubble gigapixel image of Andromeda: http://www.spacetelescope.org/images/heic1502a/
Hubble eXtreme Deep Field: http://xdf.ucolick.org/
How big is the sky? http://www.badastronomy.com/bitesize/bigsky.html
How much sand is there on Earth? http://www.hawaii.edu/suremath/jsand.html
What would the cosmic sandbox look like? https://what-if.xkcd.com/83/

Carl Sagan's Cosmos: "The Shore of the Cosmic Ocean": https://www.youtube.com/watch?v=Pa1ImgOcOPM


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

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Last week's video:
What Color Is The Universe https://www.youtube.com/watch?v=ibVofIHq71s

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

Join the community ►► https://www.patreon.com/itsokaytobesmart
SUBSCRIBE so you don’t miss a video! ►► http://bit.ly/iotbs_sub
More below:

Joe went behind the scenes at Monterey Bay Aquarium to meet the Giant Pacific Octopus, a powerful and curious creature that challenges many of our notions of intelligence!
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Books from our episodes:
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Check out the FULL video from Smarter Every Day of jellyfish stinging in microscopic slow-motion: https://www.youtube.com/watch?v=7WJCnC5ebf4

Jellyfish are mesmerizing and beautiful and I have no idea how they work. So I went behind the scenes at the Monterey Bay Aquarium with my new friend Tommy to learn all about them. I saw some things…

Why are we in Monterey? PBS and BBC are teaming up to bring you an incredible LIVE nature broadcast direct from Monterey Bay, California called BIG BLUE LIVE. In late summer, thousands and thousands of ocean animals come together here, in one of the richest ecosystems on Earth. We'll be bringing you a week of videos direct from Monterey Bay all about this incredible place and the biology it holds
Big Blue Live airs nightly on PBS 8/31-9/2 at 8 PM ET
Big Blue Live airs on BBC One 8/23 (7PM), 8/27 (8 PM), 8/30 (7 PM)

More info here:
pbs.org/bigbluelive
facebook.com/PBS
facebook.com/BBCBigBlueLive

Follow Joe during Big Blue Live!
Twitter/Periscope: @jtotheizzoe @okaytobesmart
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Instagram: @jtotheizzoe
Facebook: facebook.com/itsokaytobesmart

(Whale illustrations by Nobu Tamura/CC-BY-3.0)

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
Follow on Instagram: http://instagram.com/jtotheizzoe
Follow on Snapchat: YoDrJoe

-----------------
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
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 - 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)

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

Check out http://youarenotsosmart.com/ for more on cognitive biases
Books by David McRaney: http://amzn.to/1pQqmQh and http://amzn.to/1qrGRpM

Did blowing on NES cartridges actually do anything? http://mentalfloss.com/article..../12589/did-blowing-n
http://gaming.stackexchange.co....m/questions/15044/wh
http://www.digitpress.com/foru....m/showthread.php?117

Mario speedrun video via akyeren: https://www.youtube.com/watch?v=Boq3ghiTKHA

The Vegetable Lamb of Tartary: http://www.wired.com/2014/04/f....antastically-wrong-v

Mice from dirty laundry and other spontaneous generation: http://en.wikipedia.org/wiki/S....pontaneous_generatio

Here's another video testing the effectiveness of blowing into NES cartridges: https://www.youtube.com/watch?v=VNi4A2KGOfw

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

Video game music:
Rolemusic: Ants
Rolemusic: Bacterial Love
Rolemusic: Ladybug Castle
Rolemusic: Another Beek Beep Beer Please

Stock images via Shutterstock

Produced by PBS Digital Studios: http://www.youtube.com/user/pbsdigitalstudios

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

A dose of reality about vaccines…
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As more and more parents are choosing not to vaccinate their children or are vaccinating them later, diseases like measles are making a comeback. What's behind this antivax movement? Are vaccines safe? How do vaccines work? Why do some people claim there is a link between vaccines and autism? This week we look at why are people afraid of something that has saved so many lives, and the history and science of vaccines. #vaccine #antivax #measles


REFERENCES AND FURTHER READING:

"The Panic Virus" by Seth Mnookin: http://amzn.to/1CB8Q7p
"On Immunity" by Eula Biss: http://amzn.to/1FTmmH1

Watch "Vaccines: Calling the Shots" from PBS' NOVA: https://www.youtube.com/watch?v=NVCO6_bpsEY

The Robert Falcon Scott expedition and the lost cure for scurvy, by Maciej Cegłowski: http://idlewords.com/2010/03/scott_and_scurvy.htm

The incredible value of vaccines: http://www.gavi.org/about/miss....ion/facts-and-figure

The Guardian's herd immunity simulation: http://www.theguardian.com/soc....iety/ng-interactive/

Map of global vaccine rates: http://gamapserver.who.int/gho..../interactive_charts/

How risky are vaccine side effects? http://www.cdc.gov/vaccines/va....c-gen/side-effects.h

Eula Biss on vaccines and empathy: http://www.vox.com/2015/2/6/79....92071/how-one-vaccin


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 for PBS Digital Studios

Joe Hanson - Creator/Host/Writer
Joe Nicolosi - Director
Amanda Fox - Producer, Spotzen IncKate Eads - Associate Producer
Andrew Matthews - Editing/Motion Graphics
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:
What is Déjà Vu? https://www.youtube.com/watch?v=ut8mYGi0YRs

More videos:
Why Are Some People Left-Handed? https://www.youtube.com/watch?v=NPvMUpcxPSA
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 health (industry) mmr polio