# Vsauce

• ### Which Way Is Down?

4,479,712 views 2 weeks ago
BRAIN CANDY LIVE http://www.braincandylive.c...
THE VSAUCE CURIOSITY BOX: https://www.curiositybox.com/

my instagram https://www.instagram.com/e...

Thanks to Eric Langlay (https://www.youtube.com/use......) for producing, editing, and animating this episode with me. Thanks also to Henry Reich (https://www.youtube.com/use......) for his advice and guidance.

Universe Sandbox² : http://universesandbox.com/

Mass vs weight:

https://en.wikipedia.org/wi......

baseballs coming together under gravitational attraction can be simulated in Universe Sandbox 2. More math behind it can be found here: https://www.reddit.com/r/ex......

Weight to mass (on surface of Earth) convertor: https://www.convertunits.co......

pencil and Earth falling numbers: https://www.quora.com/When-......

NASA HD footage: https://archive.org/details......

Buoyancy: https://en.wikipedia.org/wi...

Earth’s spin and its effect on ‘down’: http://www.freemars.org/jef......

The measurement of Earth and its gravity:

https://en.wikipedia.org/wi...
https://en.wikipedia.org/wi......

Movement of Earth’s center of mass:

http://www.aiub.unibe.ch/re......
http://www.massentransporte.......
http://citeseerx.ist.psu.ed......

you get heavier before you get lighter as you descend into Earth: https://www.reddit.com/r/as......

vertical deflection:

https://en.wikipedia.org/wi......

practical uses of measuring gravity: https://en.wikipedia.org/wi...

geoid:

https://en.wikipedia.org/wi...
https://oceanservice.noaa.g......

Interactive Earth geoid: https://experiments.withgoo......

Hammer and feather drop on moon: https://nssdc.gsfc.nasa.gov......

Why things fall at the same rate: https://www.quora.com/If-an......

Wolfram Alpha cone geodesic tool: http://demonstrations.wolfr......

General Relativity:

simple animation showing geodesic on cone and how it causes motion DOWN in space: https://www.youtube.com/wat......
GREAT pbs spacetime video (watch the whole channel): https://www.youtube.com/wat......
https://www.av8n.com/physic......
http://www.pitt.edu/~jdnort......
http://www.einstein-online.......

time and gravity:

https://youtu.be/1ENkP0h8nAg
https://youtu.be/gcvq1DAM-DE
https://www.reddit.com/r/as......
https://www.reddit.com/r/As......

tests of general relativity: https://en.wikipedia.org/wi......

RECOMENDED BOOKS:

great introductory texts:

“Relativity Visualized” by Lewis Carroll Epstein https://www.amazon.com/Rela......

There’s also this PDF that takes Epstein’s diagrams into more detail: http://www.relativity.li/up......

“Relativity Simply Explained” by Martin Gardener https://www.amazon.com/Rela......

great intro to the math of general relativity:

“A Most Incomprehensible Thing: Notes Towards a Very Gentle Introduction to the Mathematics of Relativity” by Peter Collier https://www.amazon.com/Most......

Requires some background in relevant math topics (see above) but very very good:

“Spacetime And Geometry: An Introduction To General Relativity” by Sean Carrol https://www.amazon.com/gp/p...... Show less

• ### Which Way Is Down? - Duration: 26 minutes.

• 4,479,712 views
• 2 weeks ago
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• ### The Napkin Ring Problem - Duration: 10 minutes.

• 5,999,159 views
• 3 months ago
• CC
• ### How Much of the Earth Can You See at Once? - Duration: 26 minutes.

• 4,592,719 views
• 4 months ago
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• ### Vsauce Live Stream! - Duration: 1 hour, 38 minutes.

• 813,988 views
• Streamed 5 months ago
• Mind Field S1 • E8

### Do You Know Yourself? - Mind Field (Ep 8) - Duration: 25 minutes.

• Mind Field S1 • E7

### In Your Face - Mind Field (Ep 7) - Duration: 24 minutes.

• Mind Field S1 • E6

### Touch - Mind Field (Ep 6) - Duration: 21 minutes.

• Mind Field S1 • E5

• ### Showing My Desk to Adam Savage - Duration: 20 minutes.

• 5,409,926 views
• 9 months ago
• Mind Field S1 • E4

### Artificial Intelligence - Mind Field (Ep 4) - Duration: 25 minutes.

• Mind Field S1 • E3

• ### The Brachistochrone - Duration: 25 minutes.

• 5,798,712 views
• 10 months ago
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• ## Knowledge Play all

• ### The Brachistochrone - Duration: 25 minutes.

• 5,798,712 views
• 10 months ago
• ### Fixed Points - Duration: 16 minutes.

• 4,678,397 views
• 1 year ago
• ### How To Count Past Infinity - Duration: 23 minutes.

• 9,448,912 views
• 1 year ago
• ### Math Magic - Duration: 19 minutes.

• 6,584,896 views
• 1 year ago
• ### Supertasks - Duration: 21 minutes.

• 6,322,379 views
• 1 year ago
• CC
• ### The Banach–Tarski Paradox - Duration: 24 minutes.

• 14,076,282 views
• 2 years ago
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• ### Did The Past Really Happen? - Duration: 11 minutes.

• 8,408,977 views
• 2 years ago
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• ### Is Earth Actually Flat? - Duration: 10 minutes.

• 17,511,165 views
• 2 years ago
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• ### What is Random? - Duration: 11 minutes.

• 5,822,776 views
• 3 years ago
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• ### Some Surprising Things - Duration: 9 minutes, 7 seconds.

• 4,847,492 views
• 3 years ago
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• ### How Many Things Are There? - Duration: 8 minutes, 47 seconds.

• 4,919,410 views
• 3 years ago
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• ### Is Anything Real? - Duration: 11 minutes.

• 10,887,716 views
• 4 years ago
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• ## Human Behavior Play all

• ### Showing My Desk to Adam Savage - Duration: 20 minutes.

• 5,409,926 views
• 9 months ago
• ### Alzheimer's and the Brain - Duration: 15 minutes.

• 4,243,721 views
• 1 year ago
• ### Why Don't We All Have Cancer? - Duration: 9 minutes, 23 seconds.

• 6,438,352 views
• 3 years ago
• CC
• ### The Science of Awkwardness - Duration: 13 minutes.

• 6,755,599 views
• 2 years ago
• CC
• ### Is All Fair In Love And War? - Duration: 9 minutes, 59 seconds.

• 4,358,441 views
• 2 years ago
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• ### Why Are We Morbidly Curious? - Duration: 13 minutes.

• 5,239,260 views
• 3 years ago
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• ### Spooky Coincidences? - Duration: 14 minutes.

• 11,947,700 views
• 3 years ago
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• ### Risk. - Duration: 8 minutes, 6 seconds.

• 5,452,642 views
• 3 years ago
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• ### What Does Human Taste Like? - Duration: 10 minutes.

• 10,274,274 views
• 3 years ago
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• ### Why Is Your BOTTOM in the MIDDLE? - Duration: 10 minutes.

• 4,566,063 views
• 3 years ago
• CC
• ### m͏̺͓̲̥̪í͇͔̠ś̷͎̹̲̻̻̘̝t̞̖͍͚̤k̥̞à̸͕̮͍͉̹̰͚̰ẹ̶̢̪s͏̨͈̙̹̜͚̲ ̛̬͓͟ - Duration: 9 minutes, 46 seconds.

• 7,553,444 views
• 3 years ago
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• 11,977,005 views
• 3 years ago
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• ## Physics Play all

• ### Spinning - Duration: 17 minutes.

• 5,522,248 views
• 11 months ago
• ### Would Headlights Work at Light Speed? - Duration: 12 minutes.

• 4,703,404 views
• 2 years ago
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• ### Is Earth Actually Flat? - Duration: 10 minutes.

• 17,511,165 views
• 2 years ago
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• ### What Is The Speed of Dark? - Duration: 13 minutes.

• 10,556,955 views
• 3 years ago
• CC
• ### INSIDE a Spherical Mirror - Duration: 7 minutes, 14 seconds.

• 8,817,803 views
• 4 years ago
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• ### SPACE STRAW - Duration: 10 minutes.

• 6,306,171 views
• 4 years ago
• CC
• ### How Many Calories are on a Smudgy Screen? - Duration: 6 minutes, 22 seconds.

• 3,950,087 views
• 4 years ago
• CC
• ### Is The 5-Second Rule True? - Duration: 10 minutes.

• 11,007,273 views
• 4 years ago
• CC
• ### How Much Does a Shadow Weigh? - Duration: 7 minutes, 40 seconds.

• 8,177,914 views
• 5 years ago
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• ### How Hot Can It Get? - Duration: 10 minutes.

• 8,512,681 views
• 5 years ago
• CC
• ### Guns in Space - Duration: 5 minutes, 29 seconds.

• 16,427,614 views
• 5 years ago
• CC
• ### What If Everyone JUMPED At Once? - Duration: 7 minutes, 13 seconds.

• 26,334,071 views
• 5 years ago
• CC
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• ## Space Play all

• ### Is It Okay to Touch Mars? - Duration: 18 minutes.

• 5,654,549 views
• 1 year ago
• ### How Earth Moves - Duration: 21 minutes.

• 8,954,815 views
• 1 year ago
• ### Messages For The Future - Duration: 22 minutes.

• 7,610,742 views
• 2 years ago
• CC
• ### Human Extinction - Duration: 8 minutes, 11 seconds.

• 7,256,059 views
• 2 years ago
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• ### What if the Moon was a Disco Ball? - Duration: 6 minutes, 5 seconds.

• 6,308,788 views
• 3 years ago
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• ### DISTORTIONS - Duration: 11 minutes.

• 5,796,552 views
• 3 years ago
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• ### Who Owns The Moon? - Duration: 11 minutes.

• 4,101,054 views
• 2 years ago
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• ### What's The Brightest Thing In the Universe? - Duration: 11 minutes.

• 9,877,736 views
• 3 years ago
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• ### What Will We Miss? - Duration: 9 minutes, 49 seconds.

• 10,473,437 views
• 4 years ago
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• ### Are We Ready For Aliens? - Duration: 10 minutes.

• 8,707,716 views
• 4 years ago
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• ### If - Duration: 13 minutes.

• 9,689,290 views
• 4 years ago
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• ### What if You Were Born in Space? - Duration: 13 minutes.

• 11,643,475 views
• 4 years ago
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• ## Earth Play all

• ### Talking With Attenborough - Duration: 16 minutes.

• 1,675,491 views
• 1 year ago
• ### DINOSAUR SCIENCE! feat. Chris Pratt and Jack Horner - Duration: 9 minutes, 36 seconds.

• 3,505,738 views
• 2 years ago
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• ### What Is The Earth Worth? - Duration: 13 minutes.

• 6,149,722 views
• 3 years ago
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• ### What If The Earth Stopped Spinning? - Duration: 9 minutes, 44 seconds.

• 12,263,074 views
• 3 years ago
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• ### What if the Moon was a Disco Ball? - Duration: 6 minutes, 5 seconds.

• 6,308,788 views
• 3 years ago
• CC
• ### What Does Earth Look Like? - Duration: 10 minutes.

• 7,533,763 views
• 4 years ago
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• ### What's The Most Dangerous Place on Earth? - Duration: 9 minutes, 29 seconds.

• 14,784,696 views
• 4 years ago
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• ### What If Everyone JUMPED At Once? - Duration: 7 minutes, 13 seconds.

• 26,334,071 views
• 5 years ago
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• ### We Are All Related - Duration: 5 minutes, 49 seconds.

• 4,787,939 views
• 5 years ago
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• ### Water Is Amazing -- World Water Day! - Duration: 5 minutes, 55 seconds.

• 1,553,830 views
• 5 years ago
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• ### WATER. - Duration: 4 minutes, 21 seconds.

• 4,515,359 views
• 6 years ago
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• ### WHY IS THERE A MOON? .... and more! - Duration: 5 minutes, 50 seconds.

• 2,866,894 views
• 6 years ago
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• ## Mind Field Play all

In Mind Field, host Michael Stevens brings his passion for science to his most ambitious subject yet: something we still know very little about, human behavior.

Using real subjects (including guest stars and Michael himself) Mind Field reveals some of the most mind-blowing, significant, and least-understood aspects of the human psyche.

Through expert interviews, rare footage from historical experiments, and brand-new, ground-breaking demonstrations of human nature at work, Mind Field explores the surprising things we know (and don’t know) about why people are the way they are.
• Mind Field S1 • E1

### Isolation - Mind Field (Ep 1) - Duration: 34 minutes.

Red Free episode
• Mind Field S1 • E2

### Conformity - Mind Field (Ep 2) - Duration: 23 minutes.

• Mind Field S1 • E3

### Destruction - Mind Field (Ep 3) - Duration: 25 minutes.

• Mind Field S1 • E4

### Artificial Intelligence - Mind Field (Ep 4) - Duration: 25 minutes.

• Mind Field S1 • E5

### Freedom of Choice - Mind Field (Ep 5) - Duration: 22 minutes.

• Mind Field S1 • E6

### Touch - Mind Field (Ep 6) - Duration: 21 minutes.

• Mind Field S1 • E7

### In Your Face - Mind Field (Ep 7) - Duration: 24 minutes.

• Mind Field S1 • E8

### Do You Know Yourself? - Mind Field (Ep 8) - Duration: 25 minutes.

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• ## Perception Play all

• ### The Moon Terminator Illusion - Duration: 11 minutes.

• 4,020,183 views
• 2 years ago
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• ### What Is The Resolution Of The Eye? - Duration: 9 minutes, 44 seconds.

• 8,130,199 views
• 3 years ago
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• ### Moving Illusions - Duration: 10 minutes.

• 9,360,618 views
• 3 years ago
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• ### DISTORTIONS - Duration: 11 minutes.

• 5,796,552 views
• 3 years ago
• CC
• ### 1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35... - Duration: 9 minutes, 18 seconds.

• 8,835,183 views
• 2 years ago
• CC
• ### Is Your Red The Same as My Red? - Duration: 9 minutes, 35 seconds.

• 19,716,467 views
• 4 years ago
• CC
• ### This Is Only Red - Duration: 8 minutes, 4 seconds.

• 3,813,385 views
• 4 years ago
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• ### This Is Not Yellow - Duration: 7 minutes, 9 seconds.

• 17,429,869 views
• 5 years ago
• CC
• ### YOU LIVE IN THE PAST - Duration: 7 minutes, 11 seconds.

• 5,751,686 views
• 5 years ago
• CC
• ### Rainbow Science! ... AND Why Headphones Get So Tangled. - Duration: 6 minutes, 10 seconds.

• 3,310,765 views
• 5 years ago
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• ### What is Déjà vu? - Duration: 6 minutes, 36 seconds.

• 7,590,319 views
• 6 years ago
• CC
• ### Shepard Tone Illusion .... and more! - Duration: 2 minutes, 26 seconds.

• 1,571,459 views
• 6 years ago
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• ## Popular uploads Play all

• ### What If Everyone JUMPED At Once? - Duration: 7 minutes, 13 seconds.

• 26,334,071 views
• 5 years ago
• CC
• ### Mind Field - Official Trailer - Duration: 77 seconds.

• 26,213,995 views
• 10 months ago
• CC
• ### Why Do We Kiss? - Duration: 12 minutes.

• 19,893,394 views
• 4 years ago
• CC
• ### Is Your Red The Same as My Red? - Duration: 9 minutes, 35 seconds.

• 19,716,467 views
• 4 years ago
• CC
• ### How High Can We Build? - Duration: 10 minutes.

• 18,428,816 views
• 5 years ago
• CC
• ### Travel INSIDE a Black Hole - Duration: 10 minutes.

• 18,367,219 views
• 5 years ago
• CC
• ### Is Earth Actually Flat? - Duration: 10 minutes.

• 17,511,165 views
• 2 years ago
• CC
• ### This Is Not Yellow - Duration: 7 minutes, 9 seconds.

• 17,429,869 views
• 5 years ago
• CC
• ### Guns in Space - Duration: 5 minutes, 29 seconds.

• 16,427,614 views
• 5 years ago
• CC
• Mind Field S1 • E1

### Isolation - Mind Field (Ep 1) - Duration: 34 minutes.

Red Free episode
• ### What's The Most Dangerous Place on Earth? - Duration: 9 minutes, 29 seconds.

• 14,784,696 views
• 4 years ago
• CC
• ### Why Are Things Creepy? - Duration: 8 minutes, 52 seconds.

• 14,317,367 views
• 4 years ago
• CC
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• ## More Vsauce Channels

• ### DONG - Channel

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