It's a mistery...!

There are some things I have always wondered about.  Some easy, silly questions were out of my explorer period, still haven't got an answer.
Let's look at the inmost questions of life:

1. How can airplanes fly? Well, as we know, these flying machines are huge and heavy mechanisms. How can they challange the order of physic? How can they fly?
The air isn't empty, the pressure helps the airplane to get in the atmosphere. When the speed of the airplane is enough high, the pilot can take-off the aircraft helping by the wings. The lift force makes it possible to fly an airplane. The turbines under the wings heat the air, which help to get it faster.
http://www.youtube.com/watch?v=bv3m57u6ViE

2. I'd like to know what are the Northern Lights
Electrons and protons from the sun are blown towards the earth on the 'solar wind'. Those look mysterious lights in the north and south pole of the Earth. The collisions of gas molecules generate this dancing magic.
The lights are named "Aurora borealis" in the north and "Aurora australis" in the south. 

The lights of the Aurora generally extend from 80 kilometres to as high as 640 kilometres above the earth's surface.
http://www.northernlightscentre.ca/northernlights.html

To be continued...if I get some new ideas. :)