time travel?

where is past? where is tomorrow?

time is not a place, how to travel to nowhere?

when you get there, what time is it?

we measure time by measuring matter's movement. earth moving around the sun, sand falling in sand timer.

if gravity increased, would earth move faster? would sand falling faster? gravity changes the reading/time on the clock, but time is always now, all matter and energy are alive, only in this moment.

the rest moments are in our heads, past, and future.



the production of a computer model of something, especially for the purpose of study.
"the method was tested by computer simulation"

the reality is all about matter and energy.

what kind of computer simulation able to produce/create matter and energy? other than electrical signals?



black hole is in your toilet, brush it clean, discover a white hole, win a nobel.



photon, as einstein said, every tom, dick and harry is mistaken.