From the perspective of the moving block the mass would increase while the volume would decrease this causing a lorentz contraction causing the density to increase too.

No George wouldnt agree on the sides odf the mountain because of the Lorentz contraction occurring when an object is observed from a moving position of reference we will see distortion in the image point in this case the mountain. All motion is applied to George not to us the viewer

No, I think that it does not help you live longer the human body isn’t meant to stay stationary we need exercise and internal organ movements to move nutrients and wastes out and into our body.Perhaps if there was a possibility it was correct then they would be other things to consider as the diet and lifestyle conditions of a individual.I keep myself skeptic if time dilation helps you live longer or increase your lifespan.

Yes. I consider this a life changing perspective actually when we started experimenting with the models I started thinking of every source of light I had from the lightbulb that was above me until massive light sources as the sun. Other question of physics that I would ask would how does light fuctions in a black hole or through a black hole.

What direct evidence do we have that the Earth is spinning?
Well one direct evidence that we can see is how the day and the night comes into our sight if not we wouldn’t see the difference between day and night.
Other evidence would be the weather and the seasons of the earth and this is a direct cause of the spinning of the earth.

Have you ever encountered a Foucault Pendulum?
Once I saw a Foucault Pendulum in a museum.

It’s amazing how Mr. Brian Greene gives an excellent lecture, in which with the helps of graph he give a amazing lecture that responds each question that it proposes. Am exited to continue learning from his lectures. Thank you.