hi,some question here.
is that possible "time" can be stopped or reversed?

erm,some interesting question again,
regarding big bang theory states that universe is keep expanding, however since speed of light is the fastest,will it possible light travel pass through beyond the expansion of universe?

another question,
is there any exact smallest thing in universe?
e.g (arraging according to size)atom-->proton-->electron-->a->b-->c-->like there is no smallest particle?