No. Anything in another universe would not affect this universe (if indeed you can speak of several universes - universe means EVERYTHING) But there could be regions that we cannot get to no matter what (another bubble) but then the gravity from that other bubble could not get to us either.
There may be very large amounts of matter that we cannot see (is not luminous nor absorbs light) this larger mass may be what is powering expansion.
Yes
Yes. In their universe, they have games where we are the characters.
No
There is another universe
I've not been able to figure out how to do so. I guess that means it's impossible for me.
Speeding is never permitted, at least not in CT.
None that we are aware of, yet. However, the universe is enormously, incomprehensibly large, and it is - remotely! - possible that another planet very similar to Earth might exist elsewhere.
Speeding
through distortion of gravity. By containing an extremely miniature blackhole within some sort of device, and manipulating its mass, information can be sent faster than the speed of light. This is possible because gravitational force has no limit on speed.
1.how would you get there? if you went through a black hole, you would come out of a white hole incredibly fast. Our universe has no white holes, and another has no black holes. There is a way right there. 2.You could travel to 'earth" and take a look around. Is there life, How are things going, who is the president, are there humans, does anyone know you?
Another name for the entire physical universe is cosmos. It is considered the universe as a unified whole in itself.
It's possible, theory suggests that you can time travel by entering a blackhole effecting the space time continuem. Also another theory suggest if you travel at the speed of light you will time travel, but other than that it is meerly impossible. there is another way. scientists suggest that getting dark matter or anti-matter you could rip a hole into another universe of the past. but that way since you are in a parellel universe you cannot change anything. Anti-matter can get you faster than the speed of light by far. you can travel into the future if you travel at 99.99999% the speed of light. because the laws of physics actually slow you down. so 2 weeks inside the machine passes on as 100 years outside.