Support Vsauce, your brain, Alzheimer's research, and other YouTube educators by joining THE CURIOSITY BOX: a seasonal delivery of viral science toys made by Vsauce! A portion of all proceeds goes to Alzheimer's research and our Inquisitive Fellowship, a program that gives money and resources directly to growing science channels here on YouTube! https://www.curiositybox.com

twitter:   / tweetsauce  
instagram:   / electricpants  
facebook:   / vsaucegaming  
SOURCES BELOW:

this is the video where I talk about THE SPEED OF PUSH:    • How Much Does a Shadow Weigh?  

Big thanks to Martin Archer for help with this episode: http://www.martinarcher.co.uk/

And thanks to Guy Larsen for his shadow magic:   / guylar  

music by    / jakechudnow  
and http://www.audionetwork.com

shadows faster than light:

http://math.ucr.edu/home/baez/physics...
http://physics.stackexchange.com/ques...
http://www.madsci.org/posts/archives/...

making the moon brighter: http://what-if.xkcd.com/13/

sunset and earth’s shadow and belt of venus in single pics:

http://apod.nasa.gov/apod/ap131024.html
http://apod.nasa.gov/apod/ap100729.html

amounts of evening-types in a city: http://weatherspark.com/averages/3312...

superluminal scissors:

http://math.ucr.edu/home/baez/physics...
http://boards.straightdope.com/sdmb/a...

wave animations:

http://www.ablongman.com/mullin/Anima...
http://www.acs.psu.edu/drussell/Demos...
http://resource.isvr.soton.ac.uk/spcg...

phase velocity vs. group velocity: http://resource.isvr.soton.ac.uk/spcg...

faster than light dark patches:

http://www.askamathematician.com/2013...
http://www.physicsclassroom.com/class...

make a light interference pattern at home:

http://www.exploratorium.edu/snacks/d...
http://www.instructables.com/id/How-t...

the speed of ignorance:

http://www.brainpickings.org/index.ph...
http://philosophicalfallibilism.blogs...
http://kk.org/thetechnium/2008/10/the...
http://louisecharente.wordpress.com/2...

Dunning-Kruger:

http://www.huffingtonpost.com/david-m...
http://en.wikipedia.org/wiki/McArthur...

“animalcules”: http://www.leben.us/index.php/compone...