Why is the sky blue?

Question: Why is the sky blue?
- Keywords:
  earth,
  sky
Asked by 627nenp43 to Tiernan, Sonia, Mossy, Maureen on 14 Nov 2018. This question was also asked by 525nenp43.
- Maureen answered on 14 Nov 2018:
  
  The sky is blue because molecules in the air absorb less blue light from the sun than they absorb red light from the sun.
  
  here’s a neat video about it! https://youtu.be/4pnk50rhDfs
- Sonia Lenehan answered on 14 Nov 2018:
  
  Maureen is right! This is also a cool article explaining it http://math.ucr.edu/home/baez/physics/General/BlueSky/blue_sky.html

Question: Why is the sky blue?