Licensed family therapist Stephanie Yates-Anyabwile answers the internet's burning questions about relationships. How do you know if someone is gaslighting you? Can a relationship withstand cheating? Do open relationships really work? What causes a marriage of fifteen years to fail? How do you know if your significant other is "The One"? Stephanie answers all these questions and much more. Director: Justin Wolfson Director of Photography: Eric Brouse Editor: Chris Davies Expert: Stephanie R. Yates Line Producer: Joseph Buscemi Associate Producer: Brandon White Production Manager: Eric Martinez Production Coordinator: Fernando Davila Casting Producer: Nicole Ford Camera Operator: Rahil Ashruff Audio: Jeff Gaumer Production Assistant: Patrick Sargent Post Production Supervisor: Alexa Deutsch Post Production Coordinator: Ian Bryant Supervising Editor: Doug Larsen Assistant Editor: Justin Symonds

Surfing legend Kelly Slater answers the internet's burning questions about hangin' ten. Who gets to decide who takes a wave first? How do surfers get hurt? What's the biggest wave Kelly has ever seen? Do surfers wear sunscreen? Do they wear life jackets? Kelly answers all these questions and much more! Director: Morgan Crossley Editor: Louis Lalire Talent: Kelly Slater Producer: Justin Wolfson Line Producer: Joseph Buscemi Associate Producer: Paul Gulyas Production Manager: Eric Martinez Production Coordinator: Fernando Davila Talent Booker: Meredith Judkins Post Production Supervisor: Alexa Deutsch Post Production Coordinator: Ian Bryant Supervising Editor: Doug Larsen Assistant Editor: Paul Tael

Polyphia's Tim Henson answers the internet's burning questions about guitar playing. How do you get a great guitar tone? Are expensive guitars a scam? What is a boomer bend? Why are barre chords so hard to play? How did Tim write 'Playing God'? Tim answers all these questions and much, much more! Check out Tim and Polyphia's YouTube channels: https://www.youtube.com/@TimHensonW6RST https://www.youtube.com/@Polyphia Director: Justin Wolfson Director of Photography: Constantine Economides Editor: Ron Douglas Expert: Tim Henson Line Producer: Joseph Buscemi Associate Producer: Brandon White Production Manager: Eric Martinez Production Coordinator: Fernando Davila Casting Producer: Nicole Ford Camera Operator: Rahil Ashruff Gaffer: Rebecca Van Der Meulen Audio: Gabe Quiroga Production Assistant: Patrick Sargent Post Production Supervisor: Alexa Deutsch Post Production Coordinator: Ian Bryant Supervising Editor: Doug Larsen Assistant Editor: Justin Symonds

Structural engineer Dr. Nehemiah Mabry answers the internet's burning questions about city building. How are underwater tunnels made? What city has the best urban designer? How do bridges not collapse? How do floating cities work? How do sink holes happen? Nehemiah answers all these questions and much more! Director: Lisandro Perez-Rey Director of Photography: Constantine Economides Editor: Ron Douglas Expert: Dr. Nehemiah Mabry Line Producer: Joseph Buscemi Associate Producer: Brandon White Production Manager: Eric Martinez Production Coordinator: Fernando Davila Casting Producer: Nicole Ford Camera Operator: Chris Alfonso Audio: Brett Van Deusen Production Assistant: Ryan Coppola Post Production Supervisor: Alexa Deutsch Post Production Coordinator: Ian Bryant Supervising Editor: Doug Larsen Assistant Editor: Ben Harowitz

Harvard professor and "How to Build a Life" columnist Arthur C. Brooks answers the internet's burning questions about "happiness." Does anyone else feel depression after completing a goal? Can social media cause depression? Do we get happier as we age? What is the true meaning of happiness? Arthur answers all these questions and much more. For more on Arthur Brooks, you can find a copy of his New York Times Best Selling book, From Strength to Strength at your favorite book retailers nationwide and on Amazon.com. Follow Arthur on social media for daily happiness content Instagram - @arthurcbrooks Twitter - @arthurbrooks LinkedIn - @arthur-c-brooks TikTok - @arthurcbrooks YouTube - @arthurcbrooksofficial Receive email updates from Arthur Brooks Sign up at http://arthurbrooks.com Director: Justin Wolfson Director of Photography: Jim Petit Editor: Louville Moore Expert: Arthur C. Brooks Line Producer: Joseph Buscemi Associate Producer: Brandon White Production Manager: Eric Martinez Production Coordinator: Fernando Davila Talent Booker: Mica Medoff Camera Operator: Dan Jacobs Audio: Tim Haggerty Production Assistant: Conner Pennington Post Production Supervisor: Alexa Deutsch Post Production Coordinator: Ian Bryant Supervising Editor: Doug Larsen Assistant Editor: Andy Morell

Scientist and A.I. expert Gary Marcus answers the internet's burning questions about artificial intelligence. Will ChatGPT end college essays? Is Furby A.I.? How close are we to truly self-driving cars? Is the Turing test outdated? Gary answers all these questions and much more! Director: Sean Dacanay Director of Photography: Ricardo Pomares Editor: Richard Trammell Expert: Gary Marcus Producer: Justin Wolfson Line Producer: Joseph Buscemi Associate Producer: Paul Gulyas Production Manager: Eric Martinez Production Coordinator: Fernando Davila Casting Producer: Nicole Ford Camera Operator: Josh Andersen Audio: Will Miller Production Assistant: Gee Depratt Post Production Supervisor: Alexa Deutsch Post Production Coordinator: Ian Bryant Supervising Editor: Doug Larsen Assistant Editor: Paul Tael

Chef, author, and Razza owner Dan Richer answers the internet's burning questions about pizza. Why does pepperoni curl? What are the best cheeses for making pizza? What is the most important part of a pizza? Does a calzone count as a pizza? Are San Marzano tomatoes really that great? How much does it cost to open a pizzeria? Dan answers all these questions and much more! Director: Justin Wolfson Director of Photography: Rahil Ashruff Editor: Shandor Garrison Expert: Dan Richer Producer: Justin Wolfson Line Producer: Joseph Buscemi Associate Producer: Paul Gulyas Production Manager: Eric Martinez Production Coordinator: Fernando Davila Senior Casting Producer: Nicole Ford Camera Operator: Cloud Audio: Brett Van Deusen Production Assistant: Ryan Coppola Post Production Supervisor: Alexa Deutsch Post Production Coordinator: Ian Bryant Supervising Editor: Doug Larsen Assistant Editor: Andy Morell

Jonna Mendez, former CIA Chief of Disguise, answers the internet's burning questions about spying. How many CIA assets are in Ukraine right now? Do spies get acting lessons? How do spies get recruited? Do spies get to choose their own code names? Jonna answers all these questions and much more! For more info about the world of espionage, check out the International Spy Museum: https://www.spymuseum.org Producer/Director: Lisandro Perez-Rey Director of Photography: Eric Bugash Editor: Louville Moore Expert: Jonna Mendez Line Producer: Joseph Buscemi Associate Producers: Paul Gulyas, Samantha Vélez Production Manager: Eric Martinez Production Coordinator: Fernando Davila Camera Operator: Mike Audick Audio: Elijah Sutton Production Assistant: Will Hoffinger Post Production Supervisor: Alexa Deutsch Post Production Coordinator: Ian Bryant Supervising Editor: Doug Larsen Assistant Editor: Andy Morell Additional Editor: Paul Tael

Astrophysicist Hitoshi Murayama answers the internet's burning questions about space! Are there more stars in space than grains of sand? Can the shapes of constellations change? Will we be able to observe outside of our own universe? What was in space before the universe was born? How do we know there was a Big Bang? Hitoshi answers all these questions and much more!

Cannabis scientist Dr. Amber Wise answers the web's burning questions about cannabis! What's the difference between indica and sativa? Does CBD actually do anything? Why does weed smell like THAT? Is it really okay to smoke weed every day? Dr. Wise answers all these questions and much more! Director: Justin Wolfson Director of Photography: Ricardo Pomares Editor: Ron Douglas Expert: Amber Wise Producer: Justin Wolfson Line Producer: Joseph Buscemi Associate Producer: Brandon White Production Manager: Peter Brunette Production Coordinator: Kevin Balash Casting Producer: Nick Sawyer Camera Operator: Shay Eberle-Gunst Audio: Will Miller Production Assistant: Phillip Arliss Post Production Supervisor: Alexa Deutsch Post Production Coordinator: Ian Bryant Supervising Editor: Doug Larsen Assistant Editor: Marisa DeMarini Additional Editor: Paul Tael

Sommelier André Hueston Mack answers the internet's burning questions about wine. Why do people swirl the wine glass before drinking it? What's the difference between sparkling wine and champagne? What are the different types of wine grapes? What does it mean when they say a wine is dry? André answers all these questions and much more! Director: Lisandro Perez-Rey Director of Photography: Francis Bernal Editor: Louville Moore Expert: André Hueston Mack Line Producer: Joseph Buscemi Associate Producer: Brandon White Production Manager: Peter Brunette Production Coordinator: Kevin Balash Camera Operator: Constantine Economides Audio: Brett Van Deusen Production Assistant: Ryan Coppola Post Production Supervisor: Alexa Deutsch Post Production Coordinator: Ian Bryant Supervising Editor: Doug Larsen Assistant Editor: Justin Symonds Additional Editor: Paul Tael

Clark University mycologist David Hibbett answers the internet's burning questions about mushrooms. What's the difference between crimini, button and portobello mushrooms? What are the weirdest mushrooms? Why do "magic" mushrooms exist? How can you tell if they are poisonous or not? David answers all these questions and much more! Director: Justin Wolfson Director of Photography: Constantine Economides Editor: Richard Trammell Expert: David Hibbett Line Producer: Joe Buscemi Associate Producer: Paul Gulyas Production Manager: Eric Martinez Production Coordinator: Fernando Davila Senior Casting Producer: Nicole Ford Camera Operator: Cloud Audio: Michael Guggino Production Assistant: Ryan Coppola Post Production Supervisor: Alexa Deutsch Post Production Coordinator: Ian Bryant Supervising Editor: Doug Larsen Assistant Editor: Marisa DeMarini Additional Editor: Paul Tael

Animator Genndy Tartakovsky answers the internet's burning questions about animation and cartooning. Why are there so many cartoon characters that don't wear pants? Why are Genny's Clone Wars episodes so short? How does one direct an animated show? What's the difference between animation and a cartoon? Genndy answers all these questions and much more. New episodes of “Unicorn: Warriors Eternal” premiere Thursdays at midnight on Adult Swim and next day on HBO Max. Encores air Fridays at 7pm on Adult Swim and Saturdays on Toonami. Director: Sean Dacanay Director of Photography: Matthew Sweeney Editor: Jordan Calig Expert: Genndy Tartakovsky Senior Producer: Efrat Kashai Creative Producer: Justin Wolfson Line Producer: Joseph Buscemi Associate Producer: Paul Gulyas Production Manager: Peter Brunette Production Coordinator: Kevin Balash Talent Booker: Paige Garbarini Camera Operator: Shay Eberle-Gunst Audio: Gray Thomas-Sowers Production Assistant: Ariel Labasan Groomer: Vanessa Rene Post Production Supervisor: Alexa Deutsch Post Production Coordinator: Ian Bryant Supervising Editor: Doug Larsen Additional Editor: Paul Tael Assistant Editor: Justin Symonds

Yuchun Lee, professional blackjack player and former member of the MIT card counting team, answers the internet's burning questions about casinos and odds. What are the odds of winning a slot machine? What's the best blackjack strategy? How does card counting work? What's the best poker strategy? What casino games make the house the most money? Yuchun answers all these questions and much more!

Pulmonologist Dr. Ravi Kalhan answers the internet's burning questions about our lungs. What happens to your lungs if you vape? How do our lungs know the difference between oxygen and carbon dioxide? How much snot can your lungs hold? Does lung cancer only happen because of smoking? Dr. Kalhan answers all these questions and much more! Director: Lisandro Perez-Rey Director of Photography: Francis Bernal Editor: Louville Moore Expert: Dr. Ravi Kalhan Line Producer: Joseph Buscemi Associate Producers: Paul Gulyas; Brandon White Casting Producer: Nick Sawyer Camera Operator: Eric Brouse Audio: Sean Paulsen Production Assistant: Ryan Coppola Post Production Supervisor: Alexa Deutsch Post Production Coordinator: Ian Bryant Supervising Editor: Doug Larsen Additional Editor: Paul Tael Assistant Editor: Justin Symonds

The Great American Baking Show judges Paul Hollywood and Prue Leith answer the internet's burning questions about baking. Is yeast alive? What's the difference between baking powder and baking soda? How do croissants get so flaky? What's the secret to gooey cookies? Paul and Prue answer all these questions and much more! Director: Justin Wolfson Director of Photography: Kevin Dynia Editor: Louville Moore Line Producer: Joseph Buscemi Associate Producer: Paul Gulyas; Brandon White Production Manager: Eric Martinez Production Coordinator: Fernando Davila Talent Booker: Meredith Judkins Camera Operator: Rahil Ashruff Assistant Camera: Lucas Young Sound Mixer: Brett Van Deusen Post Production Supervisor: Alexa Deutsch Post Production Coordinator: Ian Bryant Supervising Editor: Doug Larsen Additional Editor: Paul Tael Assistant Editor: Andy Morell

Human Geneticist Dr. Neville Sanjana answers the internet’s burning questions about genetics and DNA. How are our genes related to our DNA? Does our DNA change during our lifetime? How do services like ’23andMe’ work? Is alcoholism genetic? Dr. Sanjana answers all of these questions—and more!

Renowned sneaker expert and designer Jeff Staple answers your sneaker-centric questions from Twitter.

Travel expert and founder of ‘The Points Guy’ Brian Kelly joins WIRED to answer travel questions taken from Twitter. Which of the big 3 airlines is better—Delta, United, or American? What’s the best credit card for earning travel points? How far in advance of traveling should you book your flights? See Brian answer these questions and many more!

Chef Meherwan Irani joins WIRED to provide expert answers to your Indian food and curry questions from Twitter.

Archaeologist Andrew Kinkella, PhD joins WIRED to dig into the best archeology questions Twitter has to offer.

Devin Stone, adjunct law professor and host of LegalEagle on Youtube, joins WIRED to lay down the law and answer your burning questions from Twitter.

Legendary comic book artist and co-founder of Image Comics Todd McFarlane visits WIRED to answer your questions from Twitter.

Reptile expert and host of JayPrehistoricPets Jay Brewer visits WIRED to answer your questions from Twitter. Reptile Royalty starring Jay Brewer is Now Available on The Roku Channel. We inadvertently show a crocodile rather than an alligator at 4:12 of this video—sorry!

Victor M. Sweeney, a licensed funeral director and mortician, answers the internet's burning questions about burials and the interment of dead bodies.

Ophthalmologist Ashley Brissette, MD joins WIRED to answer your ocular enquires in a tech support all about eyes. How does LASIK eye surgery work? How does an eye doctor know if a baby needs glasses? What are ‘eye floaters’ and how do they work? What does an eyeball feel like? Dr. Brissette answers these questions and more—it’s Eye Support! ????

Professor and computer scientist David J. Malan joins WIRED to answer your computer and programming questions from Twitter. How do search engines compile information so quickly? Which operating system is best? How do microchips work?

Neurologist and Assistant Professor Dr. Natalie Cheng joins WIRED to answer your questions about neurology from Twitter. Why do our limbs sometimes "fall asleep?" Why do we experience headaches? Or itchiness? Is the sympathetic versus parasympathetic nerve system concept real?

Hacker and expert security consultant Jayson E. Street joins WIRED to answer your penetration test questions from Twitter. What does penetration testing entail? What are some of the most underrated physical tools used for pen tests? How can I tell if my home wifi network is compromised?

Nutritionist Dr. David Katz joins WIRED to answer your nutrition questions from the internet. How do you change your metabolism? Is organic food worth the premium price? What’s the best diet for health and longevity? Dr. Katz answers these questions and many more.

Hematologist and medical oncologist Dr. Sanjay Juneja joins WIRED to answer some bloody interesting questions from the internet.

Statistical analyst and ex-NBA assistant coach Dean Oliver visits WIRED to answer sports math questions from the internet. What’s the most efficient shot to take on a basketball court? Are NFL running backs historically undervalued at the moment? Why are there more no-hitters in baseball lately? And statistically speaking who’s better: LeBron James or Michael Jordan? Answers to these questions and more await on Sports Math Support.

Bryan Intihar, creative director of Marvel’s Spider-Man 2 for Playstation 5, visits WIRED to answer your questions about video games, the gaming industry, and your friendly neighborhood Spider-Man’s latest adventure.

Business magnate, NBA owner, angel investor and self-made mogul Mark Cuban answers your questions from Twitter.

Criminologist and former investigator Jillian Peterson answers the internet's thrilling questions about true crime. Director: Lisandro Perez-Rey Director of Photography: Constantine Economides Editor: Louville Moore Line Producer: Joseph Buscemi Associate Producer: Brandon White Production Manager: D. Eric Martinez Production Coordinator: Fernando Davila Casting Producer: Nick Sawyer Camera Operator: Cloud Sound Mixer: Brett Van Deusen Production Assistant: Albie Smith Post Production Supervisor: Alexa Deutsch Post Production Coordinator: Ian Bryant Supervising Editor: Doug Larsen Additional Editor: Paul Tael Assistant Editor: Andy Morell

Physicist Jeffrey Hazboun visits WIRED to answer the internet's swirling questions about physics. How does one split an atom? Is light a wave or a particle...or both? How soon will the universe end? Is time travel is possible given physicists' current understanding? Director: Lisandro Perez-Rey Director of Photography: AJ Young Editor: Marcus Niehaus Talent: Jeffrey Hazboun Creative Producer: Justin Wolfson Line Producer: Joseph Buscemi Associate Producer: Paul Gulyas Production Manager: Peter Brunette Production and Equipment Manager: Kevin Balash Casting Producer: Vanessa Brown Camera Operator: Lucas Vilicich Sound Mixer: Kara Johnson Production Assistant: Fernando Barajas Post Production Supervisor: Alexa Deutsch Post Production Coordinator: Ian Bryant Supervising Editor: Doug Larsen Additional Editor: Paul Tael Assistant Editor: Billy Ward

Levy Rozman returns to answer more of the internet's burning questions about the game of chess. What does he make of the Carlsen vs. Neimann controversy? What's the greatest chess move of all time? How are chess bots able to analyze an entire game? Levy answers all these questions and much more! Director: Lisandro Perez-Rey Director of Photography: Francis Bernal Editor: Louville Moore Talent: Levy Rozman Line Producer: Joseph Buscemi Associate Producer: Paul Gulyas; Brandon White Production Manager: D. Eric Martinez Production Coordinator: Fernando Davila Camera Operator: Brittany Berger Gaffer: Mar Alfonso Sound Mixer: Michael Guggino Production Assistant: Albie Smith Post Production Supervisor: Alexa Deutsch Post Production Coordinator: Ian Bryant Supervising Editor: Doug Larsen Additional Editor: Paul Tael Assistant Editor: Billy Ward

The Police drummer Stewart Copeland answers the internet's burning questions about playing the drums. What is the most difficult song to drum? What's the best way for a beginner to learn how to drum fill? Who's the best drummer he's ever seen live? Stewart answers all these questions and much, much more!Available in three distinct, deluxe editions, Stewart Copelands Police Diaries is now available. https://policediariesbook.com/Director: Justin WolfsonDirector of Photography: Francis BernalEditor: Richard TrammellTalent: Stewart CopelandLine Producer: Joseph BuscemiAssociate Producer: Brandon WhiteProduction Manager: D. Eric MartinezProduction Coordinator: Fernando DavilaTalent Booker: Paige Garbarini, Meredith JudkinsCamera Operator: CloudGaffer: Rebecca Van Der MeulenSound Mixer: Sean PaulsenProduction Assistant: Noah BierbrierPost Production Supervisor: Alexa DeutschPost Production Coordinator: Ian BryantSupervising Editor: Doug LarsenAdditional Editor: Paul TaelAssistant Editor: Billy Ward

Professor of Ancient Rome Lauren D. Ginsberg answers the internet's burning questions about the Roman Empire. What did Romans snack on in the Colosseum? Why does Ancient Roman concrete differ from modern forms of concrete? Did gladiators really fight lions? This Roman expert answers all these questions and much more. Director: Justin Wolfson Director of Photography: Constantine Economides Editor: Louville Moore; Ron Douglas Expert: Lauren Ginsberg Line Producer: Joseph Buscemi Associate Producer: Paul Gulyas; Brandon White Production Manager: D. Eric Martinez Production Coordinator: Fernando Davila Casting Producer: Nicholas Sawyer Camera Operator: Christopher Eustache Gaffer: Rebecca Van Der Meulen Sound Mixer: Michael Guggino Production Assistant: Sonia Butt Post Production Supervisor: Alexa Deutsch Post Production Coordinator: Ian Bryant Supervising Editor: Doug Larsen Additional Editor: Paul Tael Assistant Editor: Billy Ward

Mathematician Jordan Ellenberg answers the internet's burning questions about geometry. How are new shapes still being discovered? Where are we using Pythagorean theorem in real life? How many holes are in a...straw? Ellenberg answers all these questions and much, much more!Jordan Ellenberg's book Shape is available on Amazon or Penguin Random Househttps://www.amazon.com/gp/product/1984879073?tag=randohouseinc7986-20https://www.penguinrandomhouse.com/books/612131/shape-by-jordan-ellenberg/Director: Lisandro Perez-ReyDirector of Photography: Constantine EconomidesEditor: Richard TrammellExpert: Jordan EllenbergLine Producer: Joseph BuscemiAssociate Producer: Brandon WhiteProduction Manager: D. Eric MartinezProduction Coordinator: Fernando DavilaCasting Producer: Nick SawyerCamera Operator: Christopher EustacheGaffer: Rebecca Van Der MeulenSound Mixer: Michael GugginoProduction Assistant: Sonia ButtPost Production Supervisor: Alexa DeutschPost Production Coordinator: Ian BryantSupervising Editor: Doug LarsenAdditional Editor: Paul TaelAssistant Editor: Billy Ward

Toy analyst and historian Chris Byrne answers the internet's burning questions about the toys. Do kids still play with action figures or are adult collectors fueling the industry? How did the pet rock become such a hot trend? What's his favorite toy fad? This toy expert answers all these questions and much more.Director: Justin WolfsonDirector of Photography: Ben DeweyEditor: Louville MooreExpert: Chris ByrneLine Producer: Joseph BuscemiAssociate Producer: Paul GulyasProduction Manager: D. Eric MartinezProduction Coordinator: Fernando DavilaCasting Producer: Nicholas SawyerCamera Operator: Mar AlfonsoSound Mixer: Rebecca O’NeilProduction Assistant: Sonia ButtPost Production Supervisor: Alexa DeutschPost Production Coordinator: Ian BryantSupervising Editor: Doug LarsenAdditional Editor: Paul TaelAssistant Editor: Billy Ward

PuckerButt Pepper Company founder Ed Currie answers the internet's sizzling questions about peppers. Why do only mammals taste capsaicin? What kind of peppers are used in military grade pepper spray? What part of a pepper produces the most heat? This pepper master answers all these questions and more. The photo of the HPLC system was created by Wikipedia user Kommando and is licensed under the Creative Commons Attribution-Share Alike 3.0 Unported license. Director: Lisandro Perez-Rey Director of Photography: Joanne Hock Editor: Louville Moore Expert: Ed Currie Line Producer: Joseph Buscemi Associate Producer: Paul Gulyas; Brandon White Production Manager: D. Eric Martinez Production Coordinator: Fernando Davila Casting Producer: Thomas Giglio Camera Operator: John Disher Sound Mixer: Marshall Bain Production Assistant: Alex Buchhorn Post Production Supervisor: Alexa Deutsch Post Production Coordinator: Ian Bryant Supervising Editor: Doug Larsen Additional Editor: Paul Tael Assistant Editor: Justin Symonds Special Thanks: Heather Peters

Gabriela Farfan, the Smithsonian's curator of gems and minerals, answers the internet's burning questions about gemstones. Are all minerals crystals? How are diamonds cut? How do geodes form? Is the Hope Diamond actually cursed? This rock and mineral expert answers all these questions and more. Director: Lisandro Perez-Rey Director of Photography: Ben Finkel Editor: Richard Trammell Expert: Gabriela Farfan Line Producer: Joseph Buscemi Associate Producer: Brandon White Production Manager: D. Eric Martinez Production Coordinator: Fernando Davila Casting Producer: Nick Sawyer Camera Operator: Randy Feldman Sound Mixer: David Campbell Production Assistant: Brittany Barbour Post Production Supervisor: Alexa Deutsch Post Production Coordinator: Ian Bryant Supervising Editor: Doug Larsen Additional Editor: Paul Tael Assistant Editor: Billy Ward

Singer-songwriter and multi-instrumentalist Jacob Collier answers the internet's buzzing questions about instruments and musical theory. What is the difference between black and white piano keys? What makes up the rhythm section? What makes a bass line sound funky? Director: Justin Wolfson Director of Photography: Francis Bernal Expert: Jacob Collier Line Producer: Joseph Buscemi Associate Producer: Paul Gulyas; Brandon White Production Manager: D. Eric Martinez Production Coordinator: Fernando Davila Camera Operator: Christopher Eustache Sound Mixer: Rebecca O’Neil Production Assistant: Caleb Clark Special Thanks: Sean Lefkovitz

Mechanical engineer and Stanford professor Chris Gerdes answers the internet's automotive questions. Why aren't solar powered cars a thing yet? How do self-driving cars see? How can Teslas crash when on auto-pilot? Is hacking a big threat to autonomous cars? Chris answers all these questions and much more!Director: Lisandro Perez-ReyDirector of Photography: Florian PilslEditor: Jordan CaligExpert: Chris GerdesLine Producer: Joseph BuscemiAssociate Producer: Paul GulyasProduction Manager: D. Eric MartinezProduction Coordinator: Fernando DavilaCasting Producer: Nicholas SawyerCamera Operator: David SmithSound Mixer: Simon GordonProduction Assistant: Nathan SandovalPost Production Supervisor: Alexa DeutschPost Production Coordinator: Ian BryantSupervising Editor: Doug LarsenAdditional Editor: Paul TaelAssistant Editor: Andy Morell

Dermatologist Dr. Muneeb Shah returns to answer more of the internet's burning questions about skin and dermatology. Can the skin develop a dependency on chapstick? What causes dry skin? What lives on the skin's microbiome? If we shed skin cells everyday, why don't tattoos fade away?Director: Justin WolfsonDirector of Photography: Charlie JordanEditor: Richard TrammellExpert: Dr. Muneeb ShahLine Producer: Joseph BuscemiAssociate Producer: Brandon WhiteProduction Manager: D. Eric MartinezProduction Coordinator: Fernando DavilaTalent Booker: Mica Medoff, Paige GarbariniCamera Operator: Christopher EustacheGaffer: Rebecca Van Der MeulenSound Mixer: Lily Van LeeuwenProduction Assistant: Caleb ClarkPost Production Supervisor: Alexa Deutsch; Christian OlguinPost Production Coordinator: Ian Bryant; Scout AlterSupervising Editor: Doug LarsenAdditional Editor: Paul TaelAssistant Editor: Fynn Lithgow

Professor of Egyptology and Archaeology Laurel Bestock answers your questions about ancient Egypt from Twitter. What did ancient Egyptians sound like? Why is King Tut so enduringly popular? What ancient Egyptian medicine and tools do we still use in modern times? Why did they practice mummification? Answers to these questions and many more await—it's Egyptology Support. Director: Lisandro Perez-Rey Director of Photography: Francis Bernal Editor: Louville Moore Talent: Laurel Bestock Line Producer: Joseph Buscemi Associate Producer: Paul Gulyas Production Manager: Peter Brunette Production & Equipment Manager: Kevin Balash Casting Producer: Nicholas Sawyer Camera Operator: Anne Marie Halovanic Sound Mixer: Sean Paulsen Production Assistant: Sonia Butt Post Production Supervisor: Christian Olguin Post Production Coordinator: Ian Bryant Supervising Editor: Doug Larsen Additional Editor: Paul Tael Assistant Editor: Fynn Lithgow

Cardiologist Dr. Sunil Rao answers your questions about the heart from Twitter. How do you measure your maximum heart rate? Is broken heart syndrome real? What is cholesterol? Can low dose aspirin help prevent heart attacks? Answers to these questions and many more await—it's Heart Support.Check out www.PracticalClinicalSkills.com for lessons, quizzes, and heart and lung sounds.Director: Lisandro Perez-ReyDirector of Photography: Constantine EconomidesEditor: Richard TrammellExpert: Dr. Sunil RaoLine Producer: Joseph BuscemiAssociate Producer: Paul Gulyas; Brandon WhiteProduction Manager: Peter BrunetteCasting Producer: Nicholas SawyerCamera Operator: Anne Marie HalovanicSound Mixer: Sean PaulsenProduction Assistant: Noah BierbrierPost Production Supervisor: Christian OlguinPost Production Coordinator: Ian BryantSupervising Editor: Doug LarsenAdditional Editor: Paul TaelAssistant Editor: Billy Ward

Professor of marine biology Dr. Kory Evans answers your questions about fish from Twitter. Why are orcas attacking boats? What is the fastest creature in the sea? How do octopi change colors to match their environment? Are jellyfish immortal? Answers to these questions and many more await—it's Marine Biology Support.Director: Lisandro Perez-ReyDirector of Photography: Constantine EconomidesEditor: Richard TrammellExpert: Dr. Kory EvansLine Producer: Joseph BuscemiAssociate Producer: Brandon White; Paul GulyasProduction Manager: Peter BrunetteProduction & Equipment Manager: Kevin BalashCasting Producer: Nick SawyerCamera Operator: MarSound Mixer: Rebecca O’NeillProduction Assistant: Caleb ClarkPost Production Supervisor: Christian OlguinPost Production Coordinator: Ian BryantSupervising Editor: Doug LarsenAdditional Editor: Paul TaelAssistant Editor: Billy Ward

Paleoanthropologist Dr. Steven E. Churchill answers your questions about cavemen and early human evolution from Twitter. What happened to the Neanderthals? Is there a chance Big Foot is real? What did humans eat before the discovery of fire? Answers to these questions and many more await—it's Caveman Support.Director: Lisandro Perez-ReyDirector of Photography: Constantine EconomidesEditor: Louis LalireExpert: Dr. Steve ChurchillLine Producer: Joseph BuscemiAssociate Producer: Paul GulyasProduction Manager: Peter BrunetteProduction & Equipment Manager: Kevin BalashCasting Producer: Nicholas SawyerCamera Operator: Roberto HerreraSound Mixer: Sean PaulsenProduction Assistant: Caleb ClarkPost Production Supervisor: Christian OlguinPost Production Coordinator: Ian BryantSupervising Editor: Doug LarsenAdditional Editor: Jason MaliziaAssistant Editor: Andy Morell