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It’s Okay To Be Smart is hosted by Joe Hanson, Ph.D.
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Crowther, T. W., et al. "Mapping tree density at a global scale." Nature 525.7568 (2015): 201-205.
http://www.nature.com/nature/journal/...

Learn more about forest habitats: http://www.worldwildlife.org/habitats...

And let’s hear it for John Denver… https://www.youtube.com/watch?v=YBEkj...


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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It’s Okay To Be Smart is written and hosted by Joe Hanson, Ph.D.
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Why does sex exist? You might think the obvious answer is “reproduction” but there are plenty of organisms on Earth that don’t require sex to reproduce. And the more that scientists examined sex, they more they realized that it’s an expensive and inefficient way to get your genes to the next generation. The true purpose of sex is actually one of the longest-standing mysteries in evolutionary biology. But scientists are closer than ever to finding the answer. Here’s what we know about the evolutionary enigma of sex.

References: https://sites.google.com/view/....evolutionofsex-refer

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Humans can develop intense relationships, even obsessions, with the things we’re fans of. A huge part of our identities, our emotions, and our lives get tied up in these things. Why are we like this?

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Pucker up. I'm gonna lay some science on you!

When you really think about it, kissing is an odd human behavior. You know, all the rubbing of our faces all over each other. So there must be a good reason why we do it, right? From motherly comforts to testing the genetic compatibility of your "mate", the science of kissing is pretty awesome.

Learn more about "The Science of Kissing" by Sheril Kirshenbaum at http://amzn.to/Nuy0TE

Sheril's book has an extensive bibliography if you'd like to look more closely at any of these studies, but here's a couple that I mentioned:

Study of facial features and attractiveness ("men prefer fuller, redder lips"): http://psycnet.apa.org/journals/psp/68/2/261/

Claus Wedekind's famous "t-shirt" study: http://www.ncbi.nlm.nih.gov/pubmed/7630893

"Why do mothers cradle their babies on the left?" by Sieratzki and Woll, 1996 http://www.researchgate.net/pu....blication/14543476_W

Want to know more about the famous Austin mural where we shot this? http://www.austin360.com/news/....entertainment/share-

Did you catch the cameo from Julia Wilde? http://www.youtube.com/user/wildescience

Joe Hanson - Host and writer
Joe Nicolosi - Director
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Do you ever freak out about the scale of time and space? Me too!

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From the very large to the very small, the universe is an amazing place. Here's my favorite ways to explore its scale. Explore them yourself:

Scale of the Universe 2 - http://htwins.net/scale2/
Powers of Ten - Charles and Ray Eames http://www.youtube.com/watch?v=0fKBhvDjuy0
Here is Today - http://hereistoday.com/
Deep Time clock - http://deeptime.info/

More on "yugen" - http://plato.stanford.edu/entr....ies/japanese-aesthet

Created by Joe Hanson

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Develop your own science truthiness detector!

My favorite places to get science news: http://bit.ly/1dpkiI4 (Now as an RSS/OPML file thanks to @doodlewhale!! https://dl.dropboxusercontent.....com/u/8365578/feedly )
Also check out my public Twitter lists for more: http://www.twitter.com/jtotheizzoe

Those were all real headlines at the beginning. Proof:
Universe hologram: http://huff.to/1beW6W8
Chimp/pig humans: http://dailym.ai/1bSQNit
Popcorn: http://huff.to/IYEUha
LHC/black hole: http://bit.ly/1ce3VRX
Squeezing breasts: http://bit.ly/JLTV6L
Alcohol = heroin: http://cbsn.ws/19ftjXx
Calamari pregnancy: http://bit.ly/1cU5VgQ
Autism and freeways: http://bit.ly/1beWtQo
Cats: http://bit.ly/J80hME
Semen as antidepressant: http://bit.ly/18ZNIwT
Quantum afterlife: http://dailym.ai/IYFYBH

More reading:

How to read about science: http://www.theatlantic.com/hea....lth/archive/2013/12/
This is a science news article: http://www.theguardian.com/sci....ence/the-lay-scienti
Real science and health news: http://scienceblogs.com/starts....withabang/2012/02/07
Baloney detection kit: http://www.brainpickings.org/i....ndex.php/2012/03/16/
Do the Double X double take: http://www.doublexscience.org/....science-health-medic
PHD Comics: Science news cycle: http://www.phdcomics.com/comic....s/archive.php?comici

Music: Podington Bear - "Pretty Build"

Joe Hanson - Host and writer
Produced for PBS Digital Studios
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Wearing a mask is a cheap and easy way to help stop the spread of airborne infections like COVID-19. It's also a sign that you want to help protect other people and have them protect you… that we're all in this together. Here are some awesome slow-motion schlieren imaging experiments to demonstrate why masks work! Share with someone who needs to see this.

References: https://sites.google.com/view/....why-masks-work-refer

Special thanks:
Matthew Staymates - National Institute of Standards and Technology
Dr. Richard Davis - Providence Sacred Heart Medical Center (https://twitter.com/richdavisp....hd/status/1276629360
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David McRaney - You Are Not So Smart https://youarenotsosmart.com/

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Stay informed. Stay cautious, but not scared. Listen to scientists and public health officials and follow their guidance. By protecting yourself, you're protecting the most vulnerable among us. Together we can flatten the curve on COVID-19 and SARS-CoV-2. More resources below!
#COVID-19 #SARS-CoV-2 #FlattenTheCurve

3Blue1Brown on exponential growth: https://www.youtube.com/watch?v=Kas0tIxDvrg

Get info from trusted sources:
https://www.cdc.gov/coronaviru....s/2019-ncov/index.ht
https://www.who.int/emergencie....s/diseases/novel-cor
https://ourworldindata.org/coronavirus

References used: https://sites.google.com/view/....covid-19-flattenthec

Special thanks to our Brain Trust Patrons:
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Enjoy these amazing facts about owls!
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As we get ready to watch that big football game that my lawyers tell me I’m not allowed to say the name of, let’s celebrate a champion of the bird world: Stealthy and silent owls! Learn how owls fly so silently, how they see in the dark, and how owls’ incredible hearing makes them such superb aerial hunters.

Want more awesome owl science? Check out “What Makes Owls So Quiet and Deadly?” from KQED’s Deep Look: https://www.youtube.com/watch?v=a68fIQzaDBY

Special thanks to:
The Witmer Lab at Ohio University

Learn more:
Wagner, Hermann, et al. "Features of owl wings that promote silent flight." Interface Focus 7.1 (2017): 20160078.

Wagner, Hermann, et al. "Neuroethology of prey capture in the barn owl (Tyto alba L.)." Journal of Physiology-Paris 107.1 (2013): 51-61.

FOLLOW US:

It’s Okay To Be Smart is hosted by Joe Hanson, Ph.D.
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How does math keep a folded slice from drooping? And what does pizza have to do with the speed of light?

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

How a 19th Century Math Genius Taught Us the Best Way to Hold a Pizza Slice:
http://www.wired.com/2014/09/c....urvature-and-strengt

Planet Money pizza price comparison: http://www.npr.org/blogs/money..../2014/02/26/28213257

Measure the speed of light with your microwave: http://io9.com/5526055/use-you....r-microwave-to-measu

Produced for PBS Digital Studios

Joe Hanson - Host, writer, editing, graphics
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I’m vaccinated. I’m boosted. And I still got infected with the omicron variant of COVID-19. Here’s what I learned, and what it means for the possible end of this pandemic.

References and sources:
https://sites.google.com/view/....be-smart-omicron-cov

0:00 Intro
1:16 What is Omicron?
2:23 Is Omicron more contagious?
4:31 What's different about Omicron?
5:42 Is Omicron less severe?
8:07 Are the vaccines ineffective?
9:55 What no one's saying about vaccines
11:34 Injection + Infection: Is "hybrid immunity" better?
13:46 Will Omicron end the pandemic?
15:41 Final thoughts

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Is overpopulation real? Is Earth filling up with too many humans? How many people can Earth hold, anyway? As our species approaches 8 billion, human overpopulation is a major concern for many people. How can we reduce poverty and our impact on the environment? Do we need a forced one-child policy or something? Maybe not, because when we look at the science and history, populations seem to control themselves. This week we look at all these questions and more.

READ MORE:

https://ourworldindata.org

https://www.sciencemag.org/sit....e/special/population

http://science.sciencemag.org/content/346/6206/234

https://www.scientificamerican.....com/article/are-mal

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It’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: Karl Boettcher
Producer: Stephanie Noone and Amanda Fox

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

PBS Member Stations rely on viewers like you. To support your local station, go to: http://to.pbs.org/DonateOKAY
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In a world of distractions, how do we pay attention?

It seems like every week someone tells us how the internet and the digital age are overloading our brains. Sure, sometimes it feels like we're being fed more information than we can handle, that we're paying attention to the wrong things. Are we giving our brain a fair shot?

I explore some science that show how paying attention can be a bad thing, and then some science about how paying attention can be a very helpful thing
Special cameos by Hank Green and Mike Rugnetta!

Further reading:

The original Simons and Chabris experiment: http://www.youtube.com/watch?v=vJG698U2Mvo

The cocktail party effect: http://www.npr.org/blogs/healt....h/2013/03/07/1736136

The illusion of attention: http://www.guardian.co.uk/scie....nce/neurophilosophy/

How is the internet changing our brains? (Harold Rheingold and more) http://www.edge.org/q2010/q10_index.html#responses

Sherry Turkle - Alone Together http://www.ted.com/talks/sherr....y_turkle_alone_toget

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

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“In Our Nature” is a NEW special limited series on It’s Okay To Be Smart!
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Seemingly distant ecosystems, even half a world apart, are connected in surprising ways. In this special limited series, Emily Graslie and Trace Dominguez join me as we explore the universal rules of life that tie together Earth’s living systems. In episode 5, we meet some interesting bugs that use truly extreme senses to navigate their world. How do dung beetles use astronomy to roll their poo balls home? And what does a swarm of beetles descending on a packed football stadium have to do with forest fires? Welcome to the world of extreme animal senses.

References: https://sites.google.com/view/....inournature5-referen

In Our Nature is a special miniseries produced by It’s Okay To Be Smart for PBS. Stay tuned for more episodes coming this summer, here on our YouTube channel!

Original Production Funding provided by: Anne Ray Foundation, a Margaret A. Cargill Philanthropy

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They have some of the best caterpillars in Peru. The best.
Follow all of our Peru adventures on this playlist: http://bit.ly/SmartPeru
↓ More info and sources below ↓

Special thanks to Andy Warren, David Pfennig, Alex Wild, and Gustavo Londoño for helpful discussions for this video! #mimicry #rainforest

You should definitely be following Aaron Pomerantz:
http://www.thenextgenscientist.com/
Twitter: @AaronPomerantz
IG: @nextgenscientist

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

Check out Deep Look for more awesome up-close science: https://www.youtube.com/user/KQEDDeepLook

Cinerous mourner nest video courtesy of Dano Grayson: http://danograyson.com/
Cinerous mourner photos by Santiago David

References:
d'Horta, Fernando Mendonça, Guy M. Kirwan, and Dante Buzzetti. "Gaudy juvenile plumages of cinereous mourner (Laniocera hypopyrra) and Brazilian laniisoma (Laniisoma elegans)." The Wilson Journal of Ornithology 124.3 (2012): 429-435.

Forbes, Peter. Dazzled and deceived: mimicry and camouflage. Yale University Press, 2011. http://amzn.to/2dE444Z

Kikuchi, David W., and David W. Pfennig. "Predator cognition permits imperfect coral snake mimicry." The American Naturalist 176.6 (2010): 830-834.

Londoño, Gustavo A., Duván A. García, and Manuel A. Sánchez Martínez. "Morphological and behavioral evidence of Batesian mimicry in nestlings of a lowland Amazonian bird." The American Naturalist 185.1 (2015): 135-141.

Rabosky, Alison R. Davis, et al. "Coral snakes predict the evolution of mimicry across New World snakes." Nature communications 7 (2016).

Savage, Jay M., and Joseph B. Slowinski. "The colouration of the venomous coral snakes (family Elapidae) and their mimics (families Aniliidae and Colubridae)." Biological Journal of the Linnean Society 45.3 (1992): 235-254.

Thompson, Martin J., and Martijn JTN Timmermans. "Characterising the phenotypic diversity of Papilio dardanus wing patterns using an extensive museum collection." Plos one 9.5 (2014): e96815.

Wickler, Wolfgang. Mimicry in Plants and Animals: Trans. by RD Martin. Weidenfeld & Nicolson, 1968.

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It’s Okay To Be Smart is written and hosted by Joe Hanson, Ph.D.
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I love coffee. Like, a lot. You know who else loves coffee? Astronauts! And also the people who help them do awesome things in space (I think NASA might be powered by coffee). But how do astronauts actually drink coffee in space, aboard the International Space Station, in microgravity? I visited astronaut Don Pettit to learn about his invention for having a cup o’ Joe in orbit. This is some awesome science.
#space #coffee #nasa

Special thanks to Don Pettit and NASA!

Don’s collaborator on this research is Mark Weislogel from Portland State University. Learn more about Mark’s research here: https://www.pdx.edu/profile/mark-weislogel

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Check out the largest gathering of mammals on Earth!

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Visit Bat Conservation International to learn more about these amazing species and what we can do to protect them: http://batcon.org/

Thanks to Dr. Sharon Swartz and Dr Kenny Breuer from Brown University for use of their wind tunnel footage: http://www.brown.edu/Departments/EEB/EML/

Mexican free-tailed bats hunt at higher altitudes than any other bat: http://bit.ly/10e5Zpe

Doppler radar shows bats intercepting the moth invasion: http://www.youtube.com/watch?v=mvENxTke4Sc

Dr. Aaron Corcoran's research on moths jamming bat echolocation (plus VIDEOS!) http://www.sonarjamming.com/

Rainforest regrowth and seed dispersal by bats: http://bit.ly/1nzOBpN

Some bats are able to create lift more efficiently than birds: http://www.livescience.com/124....5-bats-efficient-fly

White nose syndrome: http://en.wikipedia.org/wiki/White_nose_syndrome

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...and other Christmas mysteries answered with science!
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Happy Holidays! Ever wonder how Santa could possibly manage to deliver all those presents in a single night? Or what gives red-nosed reindeer the ability to fly? And why do your Christmas lights get tangled in knots no matter how carefully you put the away?!

Here's some Christmas-themed science, as our gift to you. See you in 2015!

SOURCES:
Why Christmas lights tangle: "Spontaneous knotting of an agitated string" http://www.pnas.org/content/104/42/16432

Apollo 8 "Santa sighting" https://archive.org/details/Apollo8Highlights

Santa's reindeer are probably female: http://www.livescience.com/321....49-are-santas-reinde

Reindeer hair is hollow and "buoyant" http://www.ncbi.nlm.nih.gov/pubmed/6150798

Reindeer really do have red noses: http://www.bmj.com/content/345..../bmj.e8311.full.pdf+

Reindeer eyes change color: http://phenomena.nationalgeogr....aphic.com/2013/10/29

Santa's challenge (check my math!): http://bit.ly/1sOW15q

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Joe Nicolosi - Director
Amanda Fox - Producer, Spotzen Inc
Kate Eads - Associate Producer
Andrew Matthews - Editing/Motion Graphics
Katie Graham - Director of Photography
John Knudsen - Gaffer
Dalton Allen - Post-Production Intern

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"Ouroboros" by Kevin MacLeod

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