What is a Leap Year?
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Published on Feb 28, 2012
Why do some years have an extra leap day and what is it for?
**CGPGrey T-Shirts for sale!**: http://goo.gl/1Wlnd
Grey's blog: http://www.cgpgrey.com/blog/
Also check out MinutePhysics' video: http://www.youtube.com/watch?v=53glKE... & SciShow: http://www.youtube.com/watch?v=HnDsXh...
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Top Comments
79Ayvias 1 week ago
I think we might just die sooner from cancer by looking at your post
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xsTroNgeR1 1 month ago
Creeper in car at 1:38

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Video Responses
All Comments (3,853)
hakzpro 4 hours ago
3:05 that scared me...
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ElliottBelardo2 3 days ago
Robot on logo at 3:05
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Nicole Hibbert 3 days ago
LOL I love the reference to Australia's crazy Christmas :p
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Nicole Hibbert 3 days ago
LOL I
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Cameron Ogilvie 6 days ago
2:58 GAMEBOY
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GamingMentaly 6 days ago
bottom left corner
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ice velez 1 week ago
i saw a character in Dota
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irockleftsocks13405 1 week ago
It's not that you're not smart, you're just a bit ignorant. That's why there's people like Felipe Diniello to tell us things that things that we didn't know or think about.
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MicrosoftNestleTea 1 week ago
Guess I never thought of that.
And this is why I don't think I'm smart.
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Felipe Diniello 1 week ago
that would be the dumbest solution... almost every freaking physic constant relies on the value of a second. Time is one of the seven magnitudes in which all the others relies on. Changing that would mean that you would have to recalibrate almost any instrument.
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