Why IS the sky blue??

Ever look up at the sky and wonder why it's that color? Wonder no more! Mark's got you covered.

[xochitldiaz]

Mark rober would make a both funny and super interesting teacher

[crystaledits]

That is so cool! I love how Mark can always explain any science fact and make it super easy to understand❤️

[HarryPotterGirl]

I have had this question for years thank you for answering ❤

[thexits]

You just made me understand that in 30 seconds

[dj]

Mark is the one person that can make those boring school videos but actually fun and not boring looking with no emotion in the voice

[ThePupPack]

I learned that from Mark when he did the live video about it!

[The_DreamingEYE]

It also helps answer the age old question what are those!

[Hamburger-hptv]

Hey, great video but I have a question. The things we see.. are the colour they REFLECT.. for example we see plants as green because of chlorophyll and plants need blue and red light for photosynthesis. so they evolved into this and developed chlorophyll which is green... or is it? you see is it really green if blue and red is what it absorbs. we see things not in their but the light they reflect. Soo... is the sky REALLY blue?

[AdminHouse]

Fun Fact: Venus and Mars have blue sunsets

[maxxxthegreat]

I can't watch this because I don't have the box, yet.

[Slingerblu]

I’ve literally always wondered that, thanks man

[Warboss_Thrakka_Snazzfingas]

Does this mean that every world that you stand upon will have a blue sky? Or is it depending upon the sun?