Excellent article on gravity.... Thanks a lot...

I have two things to point out from my opinion...

Exactly how gravity functions being depicted by scientists graphically generally is still not very convincing...

Secondly, why gravity is not powering any machine directly... I mean why we are not producing electricity from machines that are powered by gravity directly...

For example... Windmills are directly powered by wind... Water mill by water... Why there's no gravity mill around?....